A dog jumps toward a couch
A cat jumps toward a couch
A dog cannot be referred as a cat.
exists e1 x1 x2.(toward(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))
exists e1 x1 x2.(toward(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_jump(e1) & n_cat(x1))