A band plays a rock show.
A group performs music.
plays shows that performs
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_show(x2) & of(x2,x3) & n_rock(x3) & n_band(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_music(x2) & n_group(x1))