two men and two women sitting on steps outdoors.
Two couples are sitting.
men and two women sitting means couple are sitting
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(s1) & on(e1,x4) & Time(x4,x5) & n_outdoors(x5) & n_step(x4) & Actor(e1,x3) & v_sit(e1) & (s1 = x3) & n_woman(x2) & card_eq_2(x2) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1) & card_eq_2(s1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_couple(x1) & card_eq_2(x1))