<http://schema.org/keywords>
"nfl positional rankings strong safeties nfl safeties top safeties nfl kam chancellor tj ward nfl player rankings nfl position rankings"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/nfl/2016/07/06/positional-rankings-strong-safeties-kam-chancellor-tj-ward>