A man is using a jackhammer to work on a sidewalk.
The man has cracked through the sidewalk with his jackhammer.
Just because a man is using a jackhammer on a sidewalk doesn't imply he has cracked through the sidewalk with his jackhammer.
exists e1 p1 x1 x2.(Theme(e1,p1) & Recipient(e1,x2) & Actor(e1,x1) & v_use(e1) & exists e2 x3.(on(e2,x3) & n_sidewalk(x3) & Actor(e2,x1) & v_work(e2)) & n_jackhammer(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_sidewalk(x2) & n_jackhammer(x3) & of(x3,x2) & n_male(x2) & n_man(x1) & through(e1,x2) & with(e1,x3) & Actor(e1,x1) & v_crack(e1))