A dark stage set is under construction.
People are building a stage for a play.
Just because A dark stage set is under construction does not mean there is a play it is being set up for.
exists p1 s1 x1 x2.(exists x3.(under(x1,x3) & n_construction(x3)) & n_set(x1) & of(x1,x2) & n_stage(x2) & a_dark(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_play(x3) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_stage(x2) & n_people(x1))