A child plays with a water gun in a pool.
A child at play.
A child doesn't have to be playing with a water gun.
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_pool(x4) & with(e1,x2) & n_gun(x2) & of(x2,x3) & n_water(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists x1 x2.(a_topic(x1) & at(x1,x2) & n_play(x2) & n_child(x1))