A man and a woman speaking into a microphone are on a stage.
A heavy metal band plays loudly.
If the band plays, the singers have to sing, not to speak, if they speak nobody would hear them
exists e1 p1 x1 x2 x3 x4 x5.(exists x6.(on(x1,x6) & n_stage(x6)) & subset_of(x3,x1) & into(e1,x5) & n_microphone(x5) & Actor(e1,x4) & v_speak(e1) & (x3 = x4) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 s1 s2 x1 x2.(a_loudly(s2) & Manner(e1,s2) & Actor(e1,x1) & v_play(e1) & n_band(x1) & of(x1,x2) & n_metal(x2) & a_heavy(s1) & Theme(s1,x1))