Construction workers are working outside a building.
Construction workers are working on the sewage outside a building.
workers are working on the sewage outside a building.
exists e1 x1 x2 x3.(outside(e1,x3) & n_building(x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2 x3 x4.(n_sewage(x3) & on(e1,x3) & outside(x3,x4) & n_building(x4) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))