Four ballet dancers in black costumes are performing on a stage.
people are at home sleeping
The ballet dancers can't be preforming and sleeping at the same time.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_stage(x4) & Actor(e1,x1) & v_perform(e1) & in(x1,x3) & n_costume(x3) & a_black(s1) & Theme(s1,x3) & n_dancer(x1) & of(x1,x2) & n_ballet(x2) & card_eq_4(x1))
exists p1 x1.(exists x2 x3.(at(x1,x2) & n_sleeping(x2) & of(x2,x3) & n_home(x3)) & n_people(x1))