Dancers a standing on a sidewalk.
Some dancers are sitting in a plane on its way to Hollywood.
If you're standing on a sidewalk, you cannot be sitting in a plane at the same time.
all x1.(n_standing(x1) -> exists x2 x3.(a_topic(x2) & on(x2,x3) & n_sidewalk(x3) & for(x2,x1) & n_dancer(x2)))
exists e1 x1 x2 x3 x4.(ne_geo_hollywood(x4) & on(e1,x3) & to(x3,x4) & n_way(x3) & of(x3,x1) & n_thing(x1) & in(e1,x2) & n_plane(x2) & Actor(e1,x1) & v_sit(e1) & n_dancer(x1))