A group of performers sing a song.
The performers are painting pictures.
The performers either sing a song or painting pictures.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_sing(e1) & n_song(x3) & of(x1,x2) & n_performer(x2) & n_group(x1))
exists e1 x1 x2.(n_performer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_paint(e1) & n_picture(x2))