Four guitarists and a drummer on stage.
guitarists and a drummer
Guitarists and a drummer on stage
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 s1 x1 x2.(a_topic(s1) & subset_of(x2,s1) & n_drummer(x2) & subset_of(x1,s1) & n_guitarist(x1))