Two dancers on stage in a club.
Two dancers perform on stage.
Just because the two dancers are dancing on stage, does not imply there is a crown for which to perform.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & in(x2,x3) & n_club(x3) & n_stage(x2) & n_dancer(x1) & card_eq_2(x1))
exists e1 x1 x2.(on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_perform(e1) & n_dancer(x1) & card_eq_2(x1))