Two smiling kitchen workers are mashing something.
Two garbage workers sitting down.
kitchen workers are not garbage workers
exists e1 e2 x1 x2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_mash(e2) & n_thing(x3) & n_worker(x1) & of(x1,x2) & n_kitchen(x2) & Actor(e1,x1) & v_smile(e1) & card_eq_2(x1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_worker(x1) & of(x1,x2) & n_garbage(x2) & card_eq_2(x1))