| http://www.w3.org/ns/prov#value | - Its major cities, notably Philadelphia and Pittsburgh, have undertaken aggressive programs to re-energize and revitalize their core urban centers and, thus, have made their downtown areas much more livable, with the result that both young professionals and youthful, active retirees are being attracted by the surge of new condos and loft apartments that have sprung up in these locations.
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