a dog plays with his toy.
A dog likes his toy.
Both sentence are talking about a dog.
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.(Theme(e1,x2) & Actor(e1,x1) & v_like(e1) & n_toy(x2) & of(x2,x1) & n_male(x1) & n_dog(x1))