A woman standing on stage singing in front of a microphone.
She is mute.
Someone can not be singing if they're mute.
exists e1 e2 x1 x2 x3 x4 x5.(a_topic(x1) & for(e1,e2) & in(e2,x4) & of(x4,x5) & n_microphone(x5) & n_front(x4) & Actor(e2,x2) & v_sing(e2) & on(e1,x3) & n_stage(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_woman(x1))
exists s1 x1.(n_female(x1) & Theme(s1,x1) & a_mute(s1))