Three children playing on a beach.
The children are playing outside.
Children by itself denotes a more general description of a group of children, in this case three children. If they are on a beach then they are outside.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_beach(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_child(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_child(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_outside(x2))