A dog herds a sheep.
There are two animals in this picture.
Dog and sheep is indicative of two animals.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_herd(e1) & n_sheep(x2) & n_dog(x1))
exists p1 x1 x2.(n_picture(x2) & in(p1,x2) & exists x3.((x1 = x3) & n_animal(x3) & card_eq_2(x3)))