A drummer sits behind a guitar player while they perform on stage.
A band is performing on stage.
A band has a drummer and guitar player.
exists e1 p1 x1 x2 x3.(exists e2 x4.(on(e2,x4) & n_stage(x4) & Actor(e2,x1) & v_perform(e2)) & n_thing(x1) & while(e1,p1) & behind(e1,x2) & n_player(x2) & of(x2,x3) & n_guitar(x3) & Actor(e1,x1) & v_sit(e1) & n_drummer(x1))
exists e1 x1 x2.(on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_perform(e1) & n_band(x1))