#JSGF V1.0;
grammar A4_inspection;
public <review> = [tobi] [please] ( <teach> | <stop> ) [please] [tobi];

<stop> = (stop [observing | it]);
<teach> = ( (this is [a | an | the] ) | ( these are [the] ) ) <object>;
<object> = ( milk | apple | box );