three musicians standing on a stage, one is playing an instrument with a keyboard and the other two are singing into microphones.
There are two drummers on stage.
There are either two or three musicians onstage.  They are either drummers or are playing and instrument with a keyboard and singing into microphones.
exists e2 e1 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 p1 x1 x2.(on(p1,x2) & n_stage(x2) & exists x3.((x1 = x3) & n_drummer(x3) & card_eq_2(x3)))