Two men walking and smiling.
The two men are sitting down on a bench.
It is not possible for the men to be walking and sitting at the same time.
exists e2 e1 x1 x2.(Actor(e2,x2) & v_smile(e2) & n_man(x2) & card_eq_2(x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_man(x1) & card_eq_2(x1) & on(e1,x2) & n_bench(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))