Two children swimming in green water.
The children are running in the sand.
Children running in sand can not be swimming in water.
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 e1 x1 x2.(n_sand(x2) & n_child(x1) & in(e1,x2) & Actor(e1,x1) & v_run(e1))