Three children are playing at the beach.
Childrens are lying at the beach
children are either playing or lying in the beach
exists e1 x1 x2.(n_beach(x2) & at(e1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_beach(x2) & at(e1,x2) & Actor(e1,x1) & v_lie(e1) & n_children(x1))