A man is using a jackhammer to work on a sidewalk.
There is a man working with a jackhammer.
Working with a jackhammer is a rephrasing of using a jackhammer to work.
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 p1 x1 e1 x2 x3 x4.((x1 = x2) & with(e1,x4) & n_jackhammer(x4) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_man(x2))