A band on a big stage plays with a star in the background.
A band on stage not playing any music.
One band is playing music, the other band is not playing music
exists e1 s1 x1 x2 x3 x4.(n_background(x4) & with(e1,x3) & in(x3,x4) & n_star(x3) & Actor(e1,x1) & v_play(e1) & on(x1,x2) & n_stage(x2) & a_big(s1) & Theme(s1,x2) & n_band(x1))
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & -all x4.(n_music(x4) -> exists e1.(Theme(e1,x4) & Actor(e1,x3) & v_play(e1))) & (x2 = x3) & n_stage(x2) & n_band(x1))