A man trains a dog to attack.
The owner of a junkyard shows his dog how to deal with trespassers.
A man doesn't imply owner of a junkyard.The fact that a man trains a dog to attack doesn't imply that he is training his dog and he is training the dog how to deal with trespassers.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_train(e1) & to(x2,x3) & n_attack(x3) & n_dog(x2) & n_man(x1))
exists e1 p1 x1 x2 x3.(n_dog(x3) & of(x3,x1) & n_male(x1) & n_owner(x1) & Theme(e1,x3) & Actor(e1,x1) & v_show(e1) & Topic(x3,p1) & exists e2 x4.(with(e2,x4) & n_trespasser(x4) & Actor(e2,x3) & v_deal(e2)) & of(x1,x2) & n_junkyard(x2))