A couple and two other women are sitting on a couch during a nighttime social event.
Four people are at a birthday party.
A nighttime social event is not necessarily a birthday party. People have nighttime gatherings for many different reasons.
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_woman(x3) & during(e1,x5) & n_event(x5) & a_social(s2) & Theme(s2,x5) & a_nighttime(s1) & Theme(s1,x5) & on(e1,x4) & n_couch(x4) & Actor(e1,x1) & v_sit(e1) & -(x1 = x3) & n_woman(x1) & card_eq_2(x1) & of(x1,x2) & n_couple(x2))
exists p1 x1.(exists x2 x3.(at(x1,x2) & n_party(x2) & of(x2,x3) & n_birthday(x3)) & n_people(x1) & card_eq_4(x1))