diff --git a/examples/stoneage/Stoneage.gf b/examples/stoneage/Stoneage.gf
index 9b1358852..69687ca09 100644
--- a/examples/stoneage/Stoneage.gf
+++ b/examples/stoneage/Stoneage.gf
@@ -6,6 +6,9 @@ cat
   CN ;
 
 fun
+  
+  -- Actions with an object
+
   Drink : NP -> NP -> S ;
   Eat : NP -> NP -> S ;
   Bite : NP -> NP -> S ;
@@ -35,6 +38,8 @@ fun
   Tie : NP -> NP -> S ;
   Count : NP -> NP -> S ;
 
+  -- Actions without an object
+
   Spit : NP -> S ;
   Vomit : NP -> S ;
   Blow : NP -> S ;
@@ -67,6 +72,8 @@ fun
 
 --  Give : NP -> NP -> NP -> S ;
 
+  -- Determiners
+
   The : CN -> NP ;
   A : CN -> NP ;
 --  This : CN -> NP ;
@@ -78,6 +85,12 @@ fun
   Few : CN -> NP ;
   Other : CN -> NP ;
 
+  One : CN -> NP ;
+  Two : CN -> NP ;
+  Three : CN -> NP ;
+  Four : CN -> NP ;
+  Five : CN -> NP ;
+
   -- Pronouns
  
   I : NP ;
diff --git a/examples/stoneage/StoneageEng.gf b/examples/stoneage/StoneageEng.gf
index d9a95fa22..8b8d6b0b2 100644
--- a/examples/stoneage/StoneageEng.gf
+++ b/examples/stoneage/StoneageEng.gf
@@ -80,6 +80,12 @@ lin
   Few = DetNP few_Det ;
   Other = DetNP other_Det ;
 
+  One = IndefNumNP one_Num ;
+  Two = IndefNumNP two_Num ;
+  Three = IndefNumNP three_Num ;
+  Four = IndefNumNP four_Num ;
+  Five = IndefNumNP five_Num ;
+
   -- Pronouns
 
   I = i_NP ;