Two children stand near a water fountain.
Three kids were playing marbles.
There can only be either two or three children.
exists e1 x1 x2 x3.(near(e1,x2) & n_fountain(x2) & of(x2,x3) & n_water(x3) & Actor(e1,x1) & v_stand(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_marble(x2) & n_kid(x1) & card_eq_3(x1))