People are going up and down on three escalators.
some people walking on the road
People can either be walking on the road or going on escalators.
exists e1 e2 s1 x1 x2 x3.(on(e2,x3) & n_escalator(x3) & card_eq_3(x3) & r_down(e2) & Actor(e2,x2) & v_go(e2) & n_people(x2) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_go(e1) & n_people(x1))
exists e1 x1 x2 x3.(n_road(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))