Four guitarists and a drummer on stage.
a woman playing the flute
A suggests only one person not more than four
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 x1 x2 x3.(n_flute(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_woman(x1))