Two men wearing hats stand behind a table with flowers on it.
The men are not wearing hats.
The men can't be wearing hats and not wearing hats at the same time.
exists e2 e1 x1 x2 x3 x4 x5.(behind(e2,x4) & with(x4,x5) & on(x5,x1) & n_thing(x1) & n_flower(x5) & n_table(x4) & Actor(e2,x1) & v_stand(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x3) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists x1.(n_man(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2)))