A man trains an attack dog.
Someone is interacting a dog.
A man is someone, and to train is an example of interacting.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_train(e1) & n_dog(x2) & of(x2,x3) & n_attack(x3) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_interact(e1) & n_dog(x2) & n_person(x1))