eegpsr grammar fixes

psGrammar/tasks/gpsr/eegpsr_2017.jsgf

@@ -24,7 +24,7 @@ public <sentence> = ([please | (could you) | (robot please) | (could you please)
 
 <takeObjFromPlcmt> = <V_take>    <NP_object> <fromLocPrep> <NP_placement>;
 <placeObjOnPlcmt> = <V_place>   (<NP_objectpron> | <NP_object>) <placePrep>   <NP_placement>;
-<findPrsInRoom> = <V_find> (<NP_name>) (<inLocPrep> | <atLocPrep>) (<NP_room> | <NP_beacon>);
+<findPrsInBeac> = <V_find> (<NP_name>) (<inLocPrep> | <atLocPrep>) (<NP_room> | <NP_beacon>);
 <findObjInRoom> = <V_find> (<NP_object>) <inLocPrep> <NP_room>;
 <guidePrsToBeacon> = <V_guide> <NP_personalpron> <toLocPrep> (<NP_room> | <NP_beacon>);
 
@@ -70,6 +70,6 @@ public <sentence> = ([please | (could you) | (robot please) | (could you please)
 <deliverPrep> = to;
 <placePrep> = on;
 <inLocPrep> = in;
-<atLocPrep> = in;
+<atLocPrep> = at;
 <fromLocPrep> = from;
 <toLocPrep> = to;