The workers prepare the large tube for hauling.
The employees are working.
Workers are employees and if you prepare to do something you are working.
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 e1 x1.(n_employee(x1) & Actor(e1,x1) & v_work(e1))