diff --git a/src/english/CatEng.gf b/src/english/CatEng.gf
index 09e96fc6..049210bc 100644
--- a/src/english/CatEng.gf
+++ b/src/english/CatEng.gf
@@ -89,8 +89,6 @@ concrete CatEng of Cat = CommonX - [Pol,CAdv] ** open ResEng, Prelude in {
     Prep = {
         s : Str ;       -- "with", "ago"
         isPre : Bool ;  -- whether it's pre- or postposition: "with"=True, "ago"=False
-        isPoss : Bool ; -- whether it becomes "whose" in FunRP: "John, whose mother is wise"
-        empty : Str ;   -- dummy empty string to avoid issues with parsing, if s field is replaced by "whose" in FunRP
         } ;
     CAdv = {s : Polarity => Str; p : Str} ;
 
diff --git a/src/english/ParadigmsEng.gf b/src/english/ParadigmsEng.gf
index 121a7758..c5f6727d 100644
--- a/src/english/ParadigmsEng.gf
+++ b/src/english/ParadigmsEng.gf
@@ -537,18 +537,12 @@ mkVoc s = lin Voc (ss s) ;
   mkPrep p = lin Prep {
     s = p ;           -- the string: "with", "in front of"
     isPre = True ;    -- default case: it is a preposition, not postposition
-    isPoss = False ;  -- default case: not possessive (i.e. no change in FunRP)
-    empty = []        -- dummy field to prevent an issue with parsing. only relevant when isPoss=True, and FunRP overrides the s field with "whose". for explanation of the issue, see https://inariksit.github.io/gf/2018/08/28/gf-gotchas.html#metavariables-or-those-question-marks-that-appear-when-parsing
     } ;
   mkPost p = mkPrep p ** {
     isPre = False -- postposition: e.g. "ago"
     } ;
   noPrep = mkPrep [] ;
 
-  possPrep : Str -> Prep = \p -> mkPrep p ** {
-    isPoss = True -- for possessive, FunRP overrides the Prep's string with "whose":
-    } ;           -- e.g. "whose mother" instead of "mother of which"
-
   mk5V a b c d e = lin V (mkVerb a b c d e ** {s1 = []}) ;
 
   regV cry =
@@ -622,7 +616,7 @@ mkVoc s = lin Voc (ss s) ;
   auxVV, infVV = \v -> lin VV {
     s = table {
           VVF vf => v.s ! vf ;
-          VVPresNeg => v.s ! VPres ++ "not" 
+          VVPresNeg => v.s ! VPres ++ "not"
           ; VVPastNeg => v.s ! VPast ++ "not"  --# notpresent
           } ;
     p = v.p ;
@@ -701,7 +695,7 @@ mkVoc s = lin Voc (ss s) ;
     mkA : (fat,fatter : Str) -> A = \fat,fatter ->
       lin A (mkAdjective fat fatter (init fatter + "st") (adj2adv fat)) ;
     mkA : (good,better,best,well : Str) -> A = \a,b,c,d ->
-      lin A (mkAdjective a b c d) 
+      lin A (mkAdjective a b c d)
     } ;
 
   invarA s = lin A {
diff --git a/src/english/RelativeEng.gf b/src/english/RelativeEng.gf
index 230c216e..512d6e1a 100644
--- a/src/english/RelativeEng.gf
+++ b/src/english/RelativeEng.gf
@@ -32,16 +32,10 @@ concrete RelativeEng of Relative = CatEng ** open ResEng, Prelude in {
       c = NPAcc
       } ;
 
-    -- John , whose every friend is right
+    -- a number, [the square of which] is 4
+    -- For a construction like "John , [whose every friend] is right", use Extend.GenRP
     FunRP p np rp = {
-      s = \\c =>
-        let npGender : Gender = (fromAgr np.a).g in
-        case p.isPoss of {
-          True  => rp.s ! RC npGender NPNomPoss ++  -- whose
-                   p.empty ++                       -- empty string to avoid metavariables
-                   np.s ! NCase Nom ;               -- NP in nom: "whose every friend"
-          False => np.s ! NPAcc ++ p.s ++ rp.s ! RPrep npGender
-          } ;
+      s = \\c => np.s ! NPAcc ++ p.s ++ rp.s ! RPrep (fromAgr np.a).g ;
       a = RAg np.a
       } ;
 
diff --git a/src/english/StructuralEng.gf b/src/english/StructuralEng.gf
index d21413b3..206ef70a 100644
--- a/src/english/StructuralEng.gf
+++ b/src/english/StructuralEng.gf
@@ -99,7 +99,7 @@ concrete StructuralEng of Structural = CatEng **
   otherwise_PConj = ss "otherwise" ;
   part_Prep = mkPrep "of" ;
   please_Voc = ss "please" ;
-  possess_Prep = possPrep "of" ;
+  possess_Prep = mkPrep "of" ;
   quite_Adv = mkAdv "quite" ;
   she_Pron = mkPron "she" "her" "her" "hers" singular P3 feminine ;
   so_AdA = mkAdA "so" ;
@@ -159,4 +159,3 @@ concrete StructuralEng of Structural = CatEng **
   lin language_title_Utt = ss "English" ;
 
 }
-