<http://schema.org/specialty>
"Comprehensive Prince George's County County, MD real estate listings with Prince George's County County, Maryland home prices &amp; MLS details, by city, town, street address, and by Prince George's County County, MD zip codes."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.realtytrac.com/mapsearch/real-estate/md/prince-georges-county/>