A group of people perform together on stage.
Performers on a stage.
Group of people perform is another form of saying performers.
exists e1 p1 x1 x2 x3.(on(e1,x3) & n_stage(x3) & exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_perform(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_stage(x2) & n_performer(x1))