A child playing in water.
The child is in water.
A child playing in water means that the child is in water.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_water(x3) & n_playing(x1) & of(x1,x2) & n_child(x2))
exists p1 x1.(n_child(x1) & exists x2.(in(x1,x2) & n_water(x2)))