Several construction workers are looking at an escalator
Construction workers walk down the stairs.
Workers cant walk down stairs and look at an escalator. They would use the escalator instead of walking.
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_escalator(x3) & Actor(e1,x1) & v_look(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2) & a_several(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_stair(x3) & down(e1,x3) & Actor(e1,x1) & v_walk(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))