three musicians standing on a stage, one is playing an instrument with a keyboard and the other two are singing into microphones.
The musicians are playing piano driven music.
A Keyboard can also be used with other instruments, not just a piano
exists e1 e2 p1 x1 x2 x3 x4.(into(e2,x4) & n_microphone(x4) & Actor(e2,x1) & v_sing(e2) & on(e1,x3) & exists e3 x5 x6 x7 x8.(Theme(e3,x6) & Actor(e3,x5) & v_play(e3) & with(x6,x7) & subset_of(x1,x7) & subset_of(x8,x7) & n_keyboard(x8) & n_instrument(x6) & n_thing(x5) & card_eq_1(x5)) & -(x1 = x1) & n_thing(x1) & card_eq_2(x1) & that(x3,p1) & n_stage(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_musician(x1) & card_eq_3(x1))
exists e1 e2 x1 x2 x3 x4.(n_musician(x1) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & Time(x2,x4) & n_music(x4) & Theme(e1,x3) & v_drive(e1) & (x2 = x3) & n_piano(x2))