Children playing on the beach.
There are two children at the beach.
The simple fact that there are children playing on the beach does not necessarily imply there are only two of them.
exists e1 x1 x2 x3.(n_beach(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1))
exists p1 x1 x3.(n_beach(x3) & exists x2.((x1 = x2) & at(x2,x3) & n_child(x2) & card_eq_2(x2)))