Two musicians on stage in front of a microphone stand.
the musicians are singing
musicians on stage means they are singing
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 e1 x1.(n_musician(x1) & Actor(e1,x1) & v_sing(e1))