Two sets of couples are standing on a downward escalator as it moves them down to the next floor.
People are stranded on a broken escalator.
The escalator cannot be moving people down if they are stranded because it is broken.
exists e1 p1 s1 s3 x1 x2 x3 x4.(n_floor(x4) & a_next(s3) & Theme(s3,x4) & exists e2 s2.(to(e2,x4) & a_down(s2) & Manner(e2,s2) & Theme(e2,x2) & Actor(e2,x1) & v_move(e2)) & n_thing(x2) & n_thing(x1) & as(e1,p1) & on(e1,x3) & n_escalator(x3) & a_downward(s1) & Theme(s1,x3) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_couple(x2) & n_set(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_escalator(x2) & a_broken(s1) & Theme(s1,x2) & Theme(e1,x1) & v_strand(e1) & n_people(x1))