diff --git a/samples/fitch/languages/jetbrains.mps.fitch/models/editor.mps b/samples/fitch/languages/jetbrains.mps.fitch/models/editor.mps
index 3f91900f..09c68dee 100644
--- a/samples/fitch/languages/jetbrains.mps.fitch/models/editor.mps
+++ b/samples/fitch/languages/jetbrains.mps.fitch/models/editor.mps
@@ -63,6 +63,7 @@
         <child id="8371900013785948359" name="part" index="2$S_pN" />
         <child id="8371900013785948365" name="parameterQuery" index="2$S_pT" />
       </concept>
+      <concept id="1638911550608571617" name="jetbrains.mps.lang.editor.structure.TransformationMenu_Default" flags="ng" index="IW6AY" />
       <concept id="1078939183254" name="jetbrains.mps.lang.editor.structure.CellModel_Component" flags="sg" stub="3162947552742194261" index="PMmxH">
         <reference id="1078939183255" name="editorComponent" index="PMmxG" />
       </concept>
@@ -1151,5 +1152,8 @@
     </node>
     <node concept="3VyMlK" id="5jVx7S20VFl" role="3ft7WO" />
   </node>
+  <node concept="IW6AY" id="2DPo4JTQI2h">
+    <ref role="aqKnT" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
+  </node>
 </model>
 
diff --git a/samples/fitch/languages/jetbrains.mps.fitch/models/structure.mps b/samples/fitch/languages/jetbrains.mps.fitch/models/structure.mps
index b4b85c8b..6a4bc9ca 100644
--- a/samples/fitch/languages/jetbrains.mps.fitch/models/structure.mps
+++ b/samples/fitch/languages/jetbrains.mps.fitch/models/structure.mps
@@ -123,7 +123,7 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="conclusion" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="4LBPYGV4cY1" resolve="LogicalSentence" />
+      <ref role="20lvS9" node="4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C4o1Q" role="PrDN$">
       <ref role="PrY4T" node="3JXBM6C4ntZ" resolve="Leaf" />
@@ -295,7 +295,7 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="sentence" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="4LBPYGV4cY1" resolve="LogicalSentence" />
+      <ref role="20lvS9" node="4LBPYGV4cY1" resolve="Sentence" />
     </node>
   </node>
   <node concept="1TIwiD" id="2aBGSFge6pw">
@@ -318,7 +318,7 @@
   </node>
   <node concept="PlHQZ" id="4LBPYGV4cY1">
     <property role="EcuMT" value="5505606474791964545" />
-    <property role="TrG5h" value="LogicalSentence" />
+    <property role="TrG5h" value="Sentence" />
   </node>
 </model>
 
diff --git a/samples/fitch/languages/jetbrains.mps.fitch/sandbox/models/jetbrains.mps.fitch.sandbox.mps b/samples/fitch/languages/jetbrains.mps.fitch/sandbox/models/jetbrains.mps.fitch.sandbox.mps
index c7717707..a175a2c8 100644
--- a/samples/fitch/languages/jetbrains.mps.fitch/sandbox/models/jetbrains.mps.fitch.sandbox.mps
+++ b/samples/fitch/languages/jetbrains.mps.fitch/sandbox/models/jetbrains.mps.fitch.sandbox.mps
@@ -8,7 +8,7 @@
   <imports />
   <registry>
     <language id="ec79e64d-4cbb-4f6c-b7b7-108dd125aba6" name="jetbrains.mps.logic.propositional">
-      <concept id="4322786184247805384" name="jetbrains.mps.logic.propositional.structure.Constant" flags="ng" index="2jWLFD" />
+      <concept id="4322786184247805384" name="jetbrains.mps.logic.propositional.structure.Proposition" flags="ng" index="2jWLFD" />
       <concept id="4322786184247805399" name="jetbrains.mps.logic.propositional.structure.Not" flags="ng" index="2jWLFQ">
         <child id="4322786184247805400" name="target" index="2jWLFT" />
       </concept>
diff --git a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/constraints.mps b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/constraints.mps
index e7d42084..4400b921 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/constraints.mps
+++ b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/constraints.mps
@@ -66,7 +66,7 @@
   </registry>
   <node concept="1M2fIO" id="3JXBM6C7aaV">
     <property role="3GE5qa" value="sentence" />
-    <ref role="1M2myG" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+    <ref role="1M2myG" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
     <node concept="EnEH3" id="3JXBM6C7aaW" role="1MhHOB">
       <ref role="EomxK" to="tpck:h0TrG11" resolve="name" />
       <node concept="QB0g5" id="3JXBM6C7aaY" role="QCWH9">
diff --git a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/editor.mps b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/editor.mps
index 6bfa9229..d57a607c 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/editor.mps
+++ b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/editor.mps
@@ -13,6 +13,7 @@
     <import index="27wh" ref="r:459ba7ac-2a61-40fc-bcc4-f13a7956cbeb(jetbrains.mps.logic.propositional.structure)" />
     <import index="tpck" ref="r:00000000-0000-4000-0000-011c89590288(jetbrains.mps.lang.core.structure)" />
     <import index="tpfp" ref="r:00000000-0000-4000-0000-011c89590519(jetbrains.mps.baseLanguage.regexp.jetbrains.mps.regexp.accessory)" />
+    <import index="jfgh" ref="r:2003997c-f9a6-418f-99d4-03e1285a3e13(jetbrains.mps.fitch.structure)" />
   </imports>
   <registry>
     <language id="18bc6592-03a6-4e29-a83a-7ff23bde13ba" name="jetbrains.mps.lang.editor">
@@ -46,10 +47,10 @@
       <concept id="8329266386016608055" name="jetbrains.mps.lang.editor.structure.ApproveDelete_Operation" flags="ng" index="2xy62i">
         <child id="8329266386016685951" name="editorContext" index="2xHN3q" />
       </concept>
+      <concept id="6718020819487620876" name="jetbrains.mps.lang.editor.structure.TransformationMenuReference_Default" flags="ng" index="A1WHr" />
       <concept id="3473224453637651916" name="jetbrains.mps.lang.editor.structure.TransformationLocation_SideTransform_PlaceInCellHolder" flags="ng" index="CtIbL">
         <property id="3473224453637651917" name="placeInCell" index="CtIbK" />
       </concept>
-      <concept id="1638911550608571617" name="jetbrains.mps.lang.editor.structure.TransformationMenu_Default" flags="ng" index="IW6AY" />
       <concept id="1638911550608610798" name="jetbrains.mps.lang.editor.structure.QueryFunction_TransformationMenu_Execute" flags="ig" index="IWg2L" />
       <concept id="1638911550608610278" name="jetbrains.mps.lang.editor.structure.TransformationMenuPart_Action" flags="ng" index="IWgqT">
         <child id="1638911550608610281" name="executeFunction" index="IWgqQ" />
@@ -59,6 +60,9 @@
         <property id="1186414551515" name="flag" index="VOm3f" />
       </concept>
       <concept id="1186414928363" name="jetbrains.mps.lang.editor.structure.SelectableStyleSheetItem" flags="ln" index="VPM3Z" />
+      <concept id="1630016958697718209" name="jetbrains.mps.lang.editor.structure.IMenuReference_Default" flags="ng" index="2Z_bC8">
+        <reference id="1630016958698373342" name="concept" index="2ZyFGn" />
+      </concept>
       <concept id="1630016958697344083" name="jetbrains.mps.lang.editor.structure.IMenu_Concept" flags="ng" index="2ZABuq">
         <reference id="6591946374543067572" name="conceptDeclaration" index="aqKnT" />
       </concept>
@@ -108,6 +112,9 @@
       <concept id="5624877018228267058" name="jetbrains.mps.lang.editor.structure.ITransformationMenu" flags="ng" index="3INCJE">
         <child id="1638911550608572412" name="sections" index="IW6Ez" />
       </concept>
+      <concept id="5624877018228264944" name="jetbrains.mps.lang.editor.structure.TransformationMenuContribution" flags="ng" index="3INDKC">
+        <child id="6718020819489956031" name="menuReference" index="AmTjC" />
+      </concept>
       <concept id="1161622981231" name="jetbrains.mps.lang.editor.structure.ConceptFunctionParameter_editorContext" flags="nn" index="1Q80Hx" />
       <concept id="7980428675268276156" name="jetbrains.mps.lang.editor.structure.TransformationMenuSection" flags="ng" index="1Qtc8_">
         <child id="7980428675268276157" name="locations" index="1Qtc8$" />
@@ -283,7 +290,7 @@
             <node concept="3cpWsn" id="3JXBM6C8YI3" role="3cpWs9">
               <property role="TrG5h" value="target" />
               <node concept="3Tqbb2" id="3JXBM6C8YHX" role="1tU5fm">
-                <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
               </node>
               <node concept="2OqwBi" id="3JXBM6C8YI4" role="33vP2m">
                 <node concept="2OqwBi" id="3JXBM6C8YI5" role="2Oq$k0">
@@ -335,7 +342,7 @@
   </node>
   <node concept="24kQdi" id="3JXBM6C3Cnb">
     <property role="3GE5qa" value="sentence" />
-    <ref role="1XX52x" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+    <ref role="1XX52x" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
     <node concept="3EZMnI" id="3JXBM6C3Cnd" role="2wV5jI">
       <node concept="3F0A7n" id="3JXBM6C3Cnk" role="3EZMnx">
         <ref role="1NtTu8" to="tpck:h0TrG11" resolve="name" />
@@ -345,7 +352,7 @@
   </node>
   <node concept="3p36aQ" id="3JXBM6C6Z0A">
     <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
     <node concept="3eGOop" id="3JXBM6C6Z0B" role="3ft7WO">
       <node concept="ucgPf" id="3JXBM6C6Z0C" role="3aKz83">
         <node concept="3clFbS" id="3JXBM6C6Z0D" role="2VODD2">
@@ -353,12 +360,12 @@
             <node concept="3cpWsn" id="3JXBM6C75mD" role="3cpWs9">
               <property role="TrG5h" value="cst" />
               <node concept="3Tqbb2" id="3JXBM6C75mA" role="1tU5fm">
-                <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+                <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
               </node>
               <node concept="2ShNRf" id="3JXBM6C75mE" role="33vP2m">
                 <node concept="3zrR0B" id="3JXBM6C75mF" role="2ShVmc">
                   <node concept="3Tqbb2" id="3JXBM6C75mG" role="3zrR0E">
-                    <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+                    <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
                   </node>
                 </node>
               </node>
@@ -668,7 +675,7 @@
             <node concept="3cpWsn" id="3JXBM6C8HbS" role="3cpWs9">
               <property role="TrG5h" value="target" />
               <node concept="3Tqbb2" id="3JXBM6C8HbO" role="1tU5fm">
-                <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
               </node>
               <node concept="2OqwBi" id="3JXBM6C8HbT" role="33vP2m">
                 <node concept="2OqwBi" id="3JXBM6C8HbU" role="2Oq$k0">
@@ -718,9 +725,32 @@
       </node>
     </node>
   </node>
-  <node concept="IW6AY" id="3JXBM6C7kDX">
+  <node concept="3p36aQ" id="4LBPYGV20UT">
     <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3FnV" resolve="And" />
+  </node>
+  <node concept="3p36aQ" id="4LBPYGV21ly">
+    <property role="3GE5qa" value="sentence" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3Fph" resolve="If" />
+  </node>
+  <node concept="3p36aQ" id="4LBPYGV21lW">
+    <property role="3GE5qa" value="sentence" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3Frx" resolve="Iff" />
+  </node>
+  <node concept="3p36aQ" id="4LBPYGV21mm">
+    <property role="3GE5qa" value="sentence" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3FoA" resolve="Or" />
+  </node>
+  <node concept="3p36aQ" id="4LBPYGV21nq">
+    <property role="3GE5qa" value="sentence" />
+    <ref role="aqKnT" to="27wh:3JXBM6C3Cnq" resolve="LogicalSentence" />
+  </node>
+  <node concept="3INDKC" id="2DPo4JTQJdi">
+    <property role="3GE5qa" value="sentence" />
+    <property role="TrG5h" value="LogicalSentence_Transforma" />
+    <node concept="A1WHr" id="2DPo4JTQKqB" role="AmTjC">
+      <ref role="2ZyFGn" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
+    </node>
     <node concept="1Qtc8_" id="3JXBM6C7kDY" role="IW6Ez">
       <node concept="IWgqT" id="3JXBM6C7kEa" role="1Qtc8A">
         <node concept="1hCUdq" id="3JXBM6C7kEc" role="1hCUd6">
@@ -738,7 +768,7 @@
               <node concept="3cpWsn" id="3JXBM6C7mal" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C7maj" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C7mam" role="33vP2m" />
               </node>
@@ -806,7 +836,7 @@
               <node concept="3cpWsn" id="3JXBM6C7Ocg" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C7Och" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C7Oci" role="33vP2m" />
               </node>
@@ -874,7 +904,7 @@
               <node concept="3cpWsn" id="3JXBM6C8cFt" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C8cFu" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C8cFv" role="33vP2m" />
               </node>
@@ -942,7 +972,7 @@
               <node concept="3cpWsn" id="3JXBM6C8jY1" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C8jY2" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C8jY3" role="33vP2m" />
               </node>
@@ -1017,7 +1047,7 @@
               <node concept="3cpWsn" id="3JXBM6C7GZx" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C7GZy" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C7GZz" role="33vP2m" />
               </node>
@@ -1085,7 +1115,7 @@
               <node concept="3cpWsn" id="3JXBM6C7RN9" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C7RNa" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C7RNb" role="33vP2m" />
               </node>
@@ -1153,7 +1183,7 @@
               <node concept="3cpWsn" id="3JXBM6C814j" role="3cpWs9">
                 <property role="TrG5h" value="orig" />
                 <node concept="3Tqbb2" id="3JXBM6C814k" role="1tU5fm">
-                  <ref role="ehGHo" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
+                  <ref role="ehGHo" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
                 </node>
                 <node concept="7Obwk" id="3JXBM6C814l" role="33vP2m" />
               </node>
@@ -1199,25 +1229,5 @@
       </node>
     </node>
   </node>
-  <node concept="3p36aQ" id="4LBPYGV20UT">
-    <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3FnV" resolve="And" />
-  </node>
-  <node concept="3p36aQ" id="4LBPYGV21ly">
-    <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3Fph" resolve="If" />
-  </node>
-  <node concept="3p36aQ" id="4LBPYGV21lW">
-    <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3Frx" resolve="Iff" />
-  </node>
-  <node concept="3p36aQ" id="4LBPYGV21mm">
-    <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3FoA" resolve="Or" />
-  </node>
-  <node concept="3p36aQ" id="4LBPYGV21nq">
-    <property role="3GE5qa" value="sentence" />
-    <ref role="aqKnT" to="27wh:3JXBM6C3Cnq" resolve="Sentence" />
-  </node>
 </model>
 
diff --git a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/structure.mps b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/structure.mps
index 712fc90c..c44d0d15 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/structure.mps
+++ b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/structure.mps
@@ -54,19 +54,19 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="conjunct" />
       <property role="20lbJX" value="1..n" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Fsj" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="LogicalSentence" />
     </node>
   </node>
   <node concept="1TIwiD" id="3JXBM6C3Cn8">
     <property role="EcuMT" value="4322786184247805384" />
-    <property role="TrG5h" value="Constant" />
+    <property role="TrG5h" value="Proposition" />
     <property role="3GE5qa" value="sentence" />
-    <property role="R4oN_" value="Constant" />
-    <node concept="PrWs8" id="3JXBM6C3Fso" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+    <property role="R4oN_" value="Proposition" />
+    <node concept="PrWs8" id="2DPo4JTQslZ" role="PzmwI">
+      <ref role="PrY4T" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Cn9" role="PzmwI">
       <ref role="PrY4T" to="tpck:h0TrEE$" resolve="INamedConcept" />
@@ -83,17 +83,17 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="antecedent" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="1TJgyj" id="3JXBM6C3Fpk" role="1TKVEi">
       <property role="IQ2ns" value="4322786184247817812" />
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="consequent" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Fss" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="LogicalSentence" />
     </node>
   </node>
   <node concept="1TIwiD" id="3JXBM6C3Frx">
@@ -107,17 +107,17 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="antecedent" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="1TJgyj" id="3JXBM6C3FrG" role="1TKVEi">
       <property role="IQ2ns" value="4322786184247817964" />
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="consequent" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Fsu" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="LogicalSentence" />
     </node>
   </node>
   <node concept="1TIwiD" id="3JXBM6C3Cnn">
@@ -131,10 +131,10 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="target" />
       <property role="20lbJX" value="1" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Fsw" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="LogicalSentence" />
     </node>
   </node>
   <node concept="1TIwiD" id="3JXBM6C3FoA">
@@ -148,18 +148,18 @@
       <property role="20lmBu" value="aggregation" />
       <property role="20kJfa" value="disjunct" />
       <property role="20lbJX" value="1..n" />
-      <ref role="20lvS9" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="20lvS9" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
     <node concept="PrWs8" id="3JXBM6C3Fsy" role="PzmwI">
-      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="Sentence" />
+      <ref role="PrY4T" node="3JXBM6C3Cnq" resolve="LogicalSentence" />
     </node>
   </node>
   <node concept="PlHQZ" id="3JXBM6C3Cnq">
     <property role="EcuMT" value="4322786184247805402" />
-    <property role="TrG5h" value="Sentence" />
+    <property role="TrG5h" value="LogicalSentence" />
     <property role="3GE5qa" value="sentence" />
     <node concept="PrWs8" id="4LBPYGV4d_8" role="PrDN$">
-      <ref role="PrY4T" to="jfgh:4LBPYGV4cY1" resolve="LogicalSentence" />
+      <ref role="PrY4T" to="jfgh:4LBPYGV4cY1" resolve="Sentence" />
     </node>
   </node>
 </model>
diff --git a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/types.mps b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/types.mps
index 70ef4d1f..de54f1d3 100644
--- a/samples/fitch/languages/jetbrains.mps.logic.propositional/models/types.mps
+++ b/samples/fitch/languages/jetbrains.mps.logic.propositional/models/types.mps
@@ -290,7 +290,7 @@
       <node concept="3eYOCq" id="5RfK0kxl0WG" role="3eYTkm">
         <property role="TrG5h" value="cst" />
         <node concept="3Tqbb2" id="5RfK0kxl0WH" role="3eYSA1">
-          <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Constant" />
+          <ref role="ehGHo" to="27wh:3JXBM6C3Cn8" resolve="Proposition" />
         </node>
       </node>
       <node concept="3uniRm" id="5RfK0kxl0X2" role="3unh6L">