Young children play in the sprinkler.
The girls are playing.
Young children does not necessarily mean girls or boys.
exists e1 x1 x2 x3.(n_sprinkler(x3) & in(e1,x3) & Actor(e1,x1) & v_play(e1) & n_child(x1) & (x1 = x2) & ne_nam_young(x2))
exists e1 x1.(n_girl(x1) & Actor(e1,x1) & v_play(e1))