Six ballet dancers, three men and three women, perform on stage.
Some people playing on ground.
The people are either on stage performing or outside playing, not both.
exists e1 x1 x2 x3 x4 x5 x6 x7.(on(e1,x7) & n_stage(x7) & Actor(e1,x1) & v_perform(e1) & n_woman(x6) & card_eq_3(x6) & n_man(x5) & subset_of(x6,x3) & subset_of(x5,x3) & card_eq_3(x3) & n_dancer(x2) & of(x2,x4) & n_ballet(x4) & card_eq_6(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_ground(x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_people(x1))