three people dressed in costumes on a stage.
The people are practicing a performance of Romeo and Juliett.
You cant infer that the people are performing Romeo and Juliet based on having costumes.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x3) & on(x3,x4) & n_stage(x4) & n_costume(x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2 x3 x4 x5.(ne_org_juliett(x5) & ne_org_romeo(x4) & n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_practice(e1) & of(x2,x3) & subset_of(x5,x3) & subset_of(x4,x3) & n_performance(x2))