The workers prepare the large tube for hauling.
The workers are preparing the tube and putting it on the truck.
hauling doesn't always mean . putting it on the truck.
exists e1 s1 x1 x2 x3.(n_tube(x2) & a_large(s1) & Theme(s1,x2) & n_worker(x1) & for(e1,x3) & n_hauling(x3) & Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1))
exists e2 e1 x1 x2 x3.(n_truck(x3) & n_thing(x2) & n_worker(x1) & n_tube(x2) & on(e2,x3) & Theme(e2,x2) & Actor(e2,x1) & v_put(e2) & Theme(e1,x2) & Actor(e1,x1) & v_prepare(e1))