Two couples sitting on a leather couch.
Four people sitting on a leather sofa
Two couples implies four people and couch is a synonym for sofa.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_couch(x3) & of(x3,x4) & n_leather(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_couple(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_sofa(x3) & of(x3,x4) & n_leather(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))