Two men sit on a curb in front of a moped.
The two guys are floating in the air.
One cannot sit on a curb and float in the air at the same time.
exists e1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_mope(x4) & n_front(x3) & on(e1,x2) & n_curb(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_air(x2) & n_guy(x1) & card_eq_2(x1) & in(e1,x2) & Actor(e1,x1) & v_float(e1))