Two dogs running down a beach.
Two dogs swimming in a pool.
If a dog is swimming they can not be running.
exists e1 x1 x2 x3.(a_topic(x1) & down(e1,x3) & n_beach(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_pool(x3) & Actor(e1,x2) & v_swim(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))