The dog has retrieved his toy.
An animal is playing
a dog is a animal.
exists e1 x1 x2.(n_toy(x2) & of(x2,x1) & n_male(x1) & n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_retrieve(e1))
exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_animal(x1))