An attack dog is working with his trainer.
A man strokes an elephant's trunk.
A dog and an elephant are not the same species.
exists e1 x1 x2 x3.(with(e1,x3) & n_trainer(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_work(e1) & n_dog(x1) & of(x1,x2) & n_attack(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_stroke(e1) & n_trunk(x3) & of(x3,x2) & n_elephant(x2) & n_man(x1))