Two workers are wearing hard hats while one of them begins to descend into a floor hatch.
Two construction workers are preparing to leave the area.
Workers wearing hard hats are not necessarily preparing to leave the area.
exists e1 p1 s1 x1 x2.(exists e2 p2 x3.(Topic(e2,p2) & Actor(e2,x3) & v_begin(e2) & exists e3 x4 x5.(into(e3,x4) & n_hatch(x4) & of(x4,x5) & n_floor(x5) & Actor(e3,x3) & v_descend(e3)) & of(x3,x1) & n_thing(x3) & card_eq_1(x3)) & n_thing(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_hat(x2) & a_hard(s1) & Theme(s1,x2) & n_worker(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(n_area(x3) & Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2.(Theme(e2,x3) & Actor(e2,x1) & v_leave(e2)) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_2(x1))