Orchestral group playing music.
A large group playing music
Orchestral group implies  large group
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_music(x4) & (x1 = x3) & n_group(x1) & (x1 = x2) & ne_nam_orchestral(x2))
exists s1 x1 x2 x3.(a_topic(x1) & n_music(x1) & of(x1,x3) & n_playing(x3) & of(x1,x2) & n_group(x2) & a_large(s1) & Theme(s1,x1))