Construction site for office building.
A building finished with no construction site.
A construction site implies a building is not finished.
exists x1 x2 x3 x4.(a_topic(x1) & for(x1,x3) & n_building(x3) & of(x3,x4) & n_office(x4) & n_site(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1.(-exists x2 x3.(with(e1,x2) & n_site(x2) & of(x2,x3) & n_construction(x3)) & Actor(e1,x1) & v_finish(e1) & n_building(x1))