A dark stage set is under construction.
A stage has finished being built.
A stage cannot be finished being built if it is still under construction.
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 p1 x1.(exists e2.(Theme(e2,x1) & v_build(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_finish(e1) & n_stage(x1))