A man is riding a horse near the beach next to a dog.
A man is riding a dog.
He can't ride a horse and ride a dog at the same time.
exists e1 x1 x2 x3 x4 x5.(n_beach(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & to(x4,x5) & n_dog(x5) & next(x2,x4) & n_thing(x4) & near(x2,x3) & n_horse(x2) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_dog(x2) & n_man(x1))