diff --git a/ps-grammar/gprs/gprs.jsgf b/ps-grammar/gprs/gprs.jsgf
index 5dfc701dee2fadb49e77c4278f7db2e3846d89a2..1388de9f7580df5afa48c4cb2a1ddfaaaadf7b53 100644
--- a/ps-grammar/gprs/gprs.jsgf
+++ b/ps-grammar/gprs/gprs.jsgf
@@ -26,7 +26,7 @@ public <task> = [tobi] [(would | could) you] [please] <command> [please] [tobi];
 <personal_pronoun> = him | her | me;
 <person_name> = james|john|robert|michael|william|david|richard|charles|linda|thomas|mary|patricia|joseph|dorothy|barbara|susan|jennifer|maria|elizabeth|margaret;
 
-<grab_object> = <bathroom_class> | <drink_class> | <snack_class> | <food_class> | <tool_class> | tool | bathroom_stuff | (bathroom stuff) | drink | snack | object | food | something | stuff | item | beverage;
+<grab_object> = <bathroom_class> | <drink_class> | <snack_class> | <food_class> | <tool_class> | tool | bathroom_stuff | (bathroom stuff) | drink | snack | object | food | something | stuff | item | beverage | things;
 <bathroom_class> = shower_gel | hair_gel;
 <drink_class> = orange_juice | fruit_juice | ice_tea | coffee | beer;
 <snack_class> = chokolates | chewing_gum | peanuts;