Several people on a stage with a blue background.
The stage is empty.
If the stage is empty there cannot be several people on the stage.
exists s1 s2 x1 x2 x3.(a_topic(x1) & with(x1,x3) & n_background(x3) & a_blue(s2) & Theme(s2,x3) & on(x1,x2) & n_stage(x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists s1 x1.(n_stage(x1) & Theme(s1,x1) & a_empty(s1))