A person standing on a stage in front of a seated crowd
Someone is performing for others.
Just because a person standing on a stage in front of a seated crowd does not necessary that someone is performing for others.
exists e2 e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_crowd(x5) & Theme(e2,x5) & v_seat(e2) & n_front(x4) & on(e1,x3) & n_stage(x3) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_person(x1))
exists e1 x1 x2.(for(e1,x2) & -(x2 = x1) & n_person(x1) & n_person(x2) & Actor(e1,x1) & v_perform(e1))