A band is on stage with their instruments.
The band is without instruments.
A band can't be with their instruments and without instruments at the same time.
exists p1 x1 x3.(exists x2.(on(x1,x2) & with(x2,x3) & n_stage(x2)) & n_instrument(x3) & of(x3,x1) & n_thing(x1) & n_band(x1))
exists p1 x1.(n_band(x1) & exists x2.(without(x1,x2) & n_instrument(x2)))