three children spend time laughing on the couch.
not watched at alll
The children can either be laughing or not watched at all.
exists e1 p1 x1 x2 x3.(n_couch(x3) & exists e2.(on(e2,x3) & Actor(e2,x2) & v_laugh(e2)) & Recipient(e1,p1) & Actor(e1,x1) & Topic(e1,x2) & v_spend(e1) & n_time(x2) & n_child(x1) & card_eq_3(x1))
exists x1.(-exists e1 x2.(at(e1,x2) & n_alll(x2) & Theme(e1,x1) & v_watch(e1)) & n_thing(x1))