A restaurant worker is cleaning a seat.
A restaurant worker is performing work duties.
Cleaning a seat is a kind of work duties that a restaurant worker might perform.
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 x4.(Theme(e1,x3) & Actor(e1,x1) & v_perform(e1) & n_duty(x3) & of(x3,x4) & n_work(x4) & n_worker(x1) & of(x1,x2) & n_restaurant(x2))