Four guitarists and a drummer on stage.
guitarists and a drummer performing their favorite song
We don't know that the musicians are performing their favorite song.
exists s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & on(x2,x3) & n_stage(x3) & n_drummer(x2) & subset_of(x1,s1) & n_guitarist(x1) & card_eq_4(x1))
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_song(x4) & a_favorite(s2) & Theme(s2,x4) & of(x4,x1) & n_thing(x1) & (x2 = x3) & n_drummer(x2) & subset_of(x1,s1) & n_guitarist(x1))