Children in swimming suits playing in water.
The children are playing marco polo in the water.
The children playing may play a different game, not marco polo.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & in(e1,x5) & n_water(x5) & Actor(e1,x4) & v_play(e1) & (x2 = x4) & n_suit(x2) & of(x2,x3) & n_swimming(x3) & n_child(x1))
exists e1 x1 x2 x3 x4.(n_water(x4) & n_child(x1) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_polo(x2) & of(x2,x3) & n_marco(x3))