Two musicians on stage in front of a microphone stand.
both a man and a woman are on stage
Two musicians are not always man and woman
exists x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x2) & in(x2,x3) & of(x3,x4) & n_stand(x4) & of(x4,x5) & n_microphone(x5) & n_front(x3) & n_stage(x2) & n_musician(x1) & card_eq_2(x1))
exists p1 s1 x1 x2 x3 x4.(a_topic(s1) & Time(s1,x4) & n_both(x4) & subset_of(x2,s1) & exists x5.(on(x3,x5) & n_stage(x5)) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))