A line of workers walking down stairs.
Many people are on the stairs.
Workers are people and if there is a line of them then there are many.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_walk(e1) & n_stair(x4) & (x1 = x3) & of(x1,x2) & n_worker(x2) & n_line(x1))
exists p1 x1 x2.(n_stair(x2) & on(x1,x2) & n_people(x1) & n_quantity(x1))