Three people are sitting on a couch and one is playing with some balls.
An orgy in session on a couch.
Three people are sitting on a couch and one is playing with some balls does not indicate that an orgy in session on a couch.
exists e2 e1 x1 x2 x3 x4.(with(e2,x4) & n_ball(x4) & Actor(e2,x3) & v_play(e2) & n_thing(x3) & card_eq_1(x3) & on(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_3(x1))
exists x1 x2 x3.(a_topic(x1) & in(x1,x2) & on(x2,x3) & n_couch(x3) & n_session(x2) & n_orgy(x1))