A band plays as they sing along with the music.
A band is waiting their turn to take the stage.
The band can not be waiting and play at the same time.
exists e1 p1 x1 x2.(n_music(x2) & exists e2.(with(e2,x2) & r_along(e2) & Actor(e2,x1) & v_sing(e2)) & n_thing(x1) & as(e1,p1) & Actor(e1,x1) & v_play(e1) & n_band(x1))
exists e1 p1 x1 x2 x3.(n_stage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_wait(e1) & Topic(x2,p1) & exists e2.(Theme(e2,x3) & Actor(e2,x2) & v_take(e2)) & n_turn(x2) & of(x2,x1) & n_thing(x1) & n_band(x1))