A dog plays on the beach.
A dog is playing in the park.
He plays in park or on the beach.
exists e1 x1 x2.(n_beach(x2) & on(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))
exists e1 x1 x2.(n_park(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_dog(x1))