A band plays a rock show.
An orchestra plays Beethoven.
A band plays a rock show which entails a lot of different pieces of music, and an orchestra can do the same thing. An orchestra does not have to only play Beethoven
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.(ne_geo_beethoven(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_orchestra(x1))