A country band is playing.
A group is playing music.
A band is a group that plays music.
exists e1 x1 x2.(Actor(e1,x1) & v_play(e1) & n_band(x1) & of(x1,x2) & n_country(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & n_group(x1))