Two guys playing a guitar on stage with many lights.
Two guys playing a guitar and singing on stage with many lights.
Playing a guitar doesn't necessitate you be singing.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & with(e1,x5) & n_light(x5) & n_quantity(x5) & on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_guitar(x3) & (x1 = x2) & n_guy(x1) & card_eq_2(x1))
exists e2 e1 x1 x2 x3 x4 x5.(with(e2,x5) & n_light(x5) & n_quantity(x5) & on(e2,x4) & n_stage(x4) & Actor(e2,x3) & v_sing(e2) & n_guy(x3) & card_eq_2(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & n_guy(x1) & card_eq_2(x1))