A crowd of people are in a theater watching as men play their violins.
People are watching performers.
Musicians playing violins with people watching, meet the definition of performers.
exists e1 p1 p2 x1 x2 x5.(for(p1,e1) & exists e2 x4.(Theme(e2,x5) & Actor(e2,x4) & v_play(e2) & n_man(x4)) & n_violin(x5) & of(x5,x1) & n_thing(x1) & as(e1,p2) & Actor(e1,x1) & v_watch(e1) & exists x3.(in(x1,x3) & n_theater(x3)) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_performer(x2) & n_people(x1))