Three men perform with guitars on stage while one sings.
They make money by playing music
They may be only performing and not for money
exists e1 x1 x2 x3 x4.(while(e1,x4) & n_sing(x4) & card_eq_1(x4) & on(e1,x3) & n_stage(x3) & with(e1,x2) & n_guitar(x2) & Actor(e1,x1) & v_perform(e1) & n_man(x1) & card_eq_3(x1))
exists e1 e2 x1 x2 x3.(n_thing(x1) & by(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & n_music(x3) & Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_money(x2))