Men are walking with a pack of dogs.
Men are using a dogsled.
Walking with dogs does not imply using a doglsed.
exists e1 x1 x2 x3.(with(e1,x2) & of(x2,x3) & n_dog(x3) & n_pack(x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_dogsle(x2) & n_man(x1))