Three casually dressed Caucasians are sitting on a couch.
Some people are sitting on a white couch.
caucasians are people
exists e1 e2 x1 x2.(on(e2,x2) & n_couch(x2) & Actor(e2,x1) & v_sit(e2) & n_caucasian(x1) & Theme(e1,x1) & v_dress(e1) & r_casually(x1) & card_eq_3(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_couch(x2) & a_white(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))