A band plays on stage with two people facing each other and singing, one person playing the drums, one on keyboard and one person on guitar.
The musicians are performing.
A band plays on stage which means musicians are performing.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12.(n_drum(x7) & with(e1,x3) & rel(x3,x5) & rel(x5,x8) & subset_of(x11,x8) & on(x11,x12) & n_guitar(x12) & n_person(x11) & card_eq_1(x11) & subset_of(x9,x8) & on(x9,x10) & n_keyboard(x10) & n_thing(x9) & card_eq_1(x9) & Theme(e2,x7) & Actor(e2,x6) & v_play(e2) & (x5 = x6) & n_person(x5) & card_eq_1(x5) & all x14 x15 x13.((n_singing(x15) & n_other(x14) & subset_of(x15,x13) & subset_of(x14,x13)) -> exists e3.(Theme(e3,x13) & Actor(e3,x4) & v_face(e3))) & (x3 = x4) & n_people(x3) & card_eq_2(x3) & on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_play(e1) & n_band(x1))
exists e1 x1.(n_musician(x1) & Actor(e1,x1) & v_perform(e1))