fix

ps-grammar/sfb/review.jsgf

@@ -2,8 +2,8 @@
 grammar A4_inspection;
 public <review> = [tobi] [please] (<follow> | <observe> | <teach> | <locate> | <list> | <leave> | <continue> | <stop> ) [please] [tobi];
 
-<follow> = ( follow me [into the elevator] ) | (observe) | (watch) ;
-<observe> = (start observing | ([take a] look [(at this | here)]));
+<follow> = ( follow me [into the elevator] );
+<observe> = (start observing | ([take a] look [(at this | here)] | observe ));
 <leave> = leave;
 <continue> = continue;
 <stop> = (stop [observing | it]);