A group of people are on a stage in front of an audience.
A group of people are up on stage.
All the people are on stage in front of an audience
exists p1 x1 x2 x3 x4.(in(p1,x3) & of(x3,x4) & n_audience(x4) & n_front(x3) & exists x5.(on(x1,x5) & n_stage(x5)) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 s1 x1 x2.(a_up(s1) & Manner(p1,s1) & exists x3.(on(x1,x3) & n_stage(x3)) & of(x1,x2) & n_people(x2) & n_group(x1))