three children spend time laughing on the couch.
a bird was on rocks
We assume that children were laughing seeing the bird on rocks.
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 p1 x1.(exists x2.(on(x1,x2) & n_rock(x2)) & n_bird(x1))