added energy drink in grammar

ps-grammar/emergencySituation/object.jsgf

@@ -3,9 +3,8 @@ grammar emergencySituation_object;
 
 public <emergencySituation> = <objectPhrase>;
 
-<objectPhrase> = <water> | <biscuits> | <cellphone>;
+<objectPhrase> = <water> | <biscuits> | <energy_drink>;
 
 <water> = water;
 <biscuits> = biscuits;
-<cellphone> = cell phone;
-<nothing> = nothing;
+<energy_drink> = energy drink;