A guitar band is playing on stage.
And band is on the stage.
Playing and being on the stage are the same for bands.
exists e1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & Actor(e1,x1) & v_play(e1) & n_band(x1) & of(x1,x2) & n_guitar(x2))
exists p1 x1 x2.(n_stage(x2) & r_and(p1) & on(x1,x2) & n_band(x1))