cml go back

psGrammar/tasks/carrymyluggage/commands.jsgf

@@ -5,12 +5,14 @@ public <statement> = <command>;
 
 <robot> = (tobi | robot | tiago);
 
-<command> = [<robot>] ( <followMe> | <arrived> | <goAhead> ) [<robot>];
+<command> = [<robot>] ( <followMe> | <arrived> | <goBack> ) [<robot>];
 
-<goAhead> = ( go ahead ); 
+<goBack> = ( go back ); 
 
 <followMe> = ((follow | come with ) me [to the <place>]);
 
 <arrived> = ((stop [(here | following me)]) | (wait here) | (we arrived [ at the <place>]) );
 
 <place> = ( car );
+
+<> = ( car );