A person is panting on a wall outside.
A person sleeps on a train.
The person can't be inside the train and outside at the same time.
exists e1 x1 x2 x3.(on(e1,x2) & n_outside(x2) & of(x2,x3) & n_wall(x3) & Actor(e1,x1) & v_pant(e1) & n_person(x1))
exists e1 x1 x2.(on(e1,x2) & n_train(x2) & Actor(e1,x1) & v_sleep(e1) & n_person(x1))