Highway workers checking on roadwork.
Highway employees are doing roadwork.
Highway workers  and employees checking on roadwork.
exists e1 x1 x2 x3.(on(e1,x3) & n_roadwork(x3) & Actor(e1,x1) & v_check(e1) & n_worker(x1) & of(x1,x2) & n_highway(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & n_roadwork(x3) & n_employee(x1) & (x1 = x2) & ne_nam_highway(x2))