A cowboy riding on his horse that is jumping in the air.
A man is riding an elephant.
A man can't ride a horse and an elephant at the same time.
exists e1 s1 x1 x2 x3 x4.(n_air(x4) & a_topic(x1) & on(x1,x2) & in(e1,x4) & Actor(e1,x3) & v_jump(e1) & (x2 = x3) & n_horse(x2) & of(x2,x1) & n_male(x1) & n_riding(x1) & a_cowboy(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_elephant(x2) & n_man(x1))