<http://schema.org/keywords>
"nfl"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.usatoday.com/videos/sports/nfl/titans/2013/07/24/2584097/?ATCLID=205529927&SPID=103701&DB_LANG=C&DB_OEM_ID=28500>