A band is on stage performing.
Musicians performing
Musicians is another word for band.
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_perform(x2) & of(x2,x3) & n_stage(x3)) & n_band(x1))
exists e1 x1.(ne_nam_musicians(x1) & Actor(e1,x1) & v_perform(e1))