An attack dog is working with his trainer.
A man training an attack dog.
Training an attack dog could be stated as the dog working with his trainer.
exists e1 x1 x2 x3.(with(e1,x3) & n_trainer(x3) & of(x3,x1) & n_male(x1) & Actor(e1,x1) & v_work(e1) & n_dog(x1) & of(x1,x2) & n_attack(x2))
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_train(e1) & n_dog(x3) & of(x3,x4) & n_attack(x4) & (x1 = x2) & n_man(x1))