Two children swimming in green water.
They are in a pond.
All pond water is not green.
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_water(x3) & a_green(s1) & Theme(s1,x3) & n_swimming(x1) & of(x1,x2) & n_child(x2) & card_eq_2(x1))
exists p1 x1.(n_thing(x1) & exists x2.(in(x1,x2) & n_pond(x2)))