The band is practicing before the championship game.
The solo band is practicing before the championship game.
A band does not have to be solo.
exists e1 x1 x2 x3.(n_game(x2) & of(x2,x3) & n_championship(x3) & n_band(x1) & before(e1,x2) & Actor(e1,x1) & v_practice(e1))
exists e1 x1 x2 x3 x4.(n_game(x3) & of(x3,x4) & n_championship(x4) & n_band(x1) & of(x1,x2) & n_solo(x2) & before(e1,x3) & Actor(e1,x1) & v_practice(e1))