A man is riding a horse in an event.
A man is shooting a horse.
One will not be shooting a horse in order to be riding it.
exists e1 x1 x2 x3.(in(e1,x3) & n_event(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_shoot(e1) & n_horse(x2) & n_man(x1))