Two people perform on a stage with electric guitars.
The band is playing some heavy metal music.
They may not be a band, and they may not be playing heavy metal music.
exists e1 s1 x1 x2 x3.(on(e1,x2) & with(x2,x3) & n_guitar(x3) & a_electric(s1) & Theme(s1,x3) & n_stage(x2) & Actor(e1,x1) & v_perform(e1) & n_people(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(n_band(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & of(x2,x3) & n_metal(x3) & a_heavy(s1) & Theme(s1,x2))