a dog plays with his toy.
A dog is running for president.
A dog can't be playing and running.
exists e1 x1 x2.(with(e1,x2) & n_toy(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_play(e1) & n_dog(x1))
exists e1 x1 x2.(for(e1,x2) & n_president(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))