A restaurant worker is cleaning a seat.
The food worker is cleaning a seat.
Food worker is a rephrase of restaurant worker.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_clean(e1) & n_seat(x3) & n_worker(x1) & of(x1,x2) & n_restaurant(x2))
exists e1 x1 x2 x3.(n_worker(x1) & of(x1,x2) & n_food(x2) & Theme(e1,x3) & Actor(e1,x1) & v_clean(e1) & n_seat(x3))