A dog sitting on grass.
the sheep eat bugs
sheep and dog are different kind of animals
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_grass(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_dog(x1))
exists e1 x1 x2.(n_sheep(x1) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_bug(x2))