Four piece band practicing before the nightclub opens.
The band is playing music in preparation for the nightclub opening.
There is a four piece band practicing, because they are preparing for the nightclub to open.
exists e1 x1 x2 x3.(n_nightclub(x3) & Actor(e1,x1) & v_open(e1) & before(x1,x3) & n_band(x1) & Time(x1,x2) & n_practicing(x2) & n_piece(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4 x5.(n_opening(x4) & of(x4,x5) & n_nightclub(x5) & n_band(x1) & in(e1,x3) & for(x3,x4) & n_preparation(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2))