A child holds another child while on the ground.
The child is a boy.
Not all child is boy.
exists e1 x1 x2 x3.(n_ground(x3) & on(e1,x3) & r_while(e1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_child(x2) & -(x2 = x1) & n_child(x1) & n_child(x1))
exists p1 x1.(n_child(x1) & exists x2.((x1 = x2) & n_boy(x2)))