Two men ride horses while wielding whips.
Two men are riding on elephants.
Horses are not elephants.
exists e1 e2 x1 x2 x3.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_wield(e2) & n_whip(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_elephant(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_2(x1))