<http://schema.org/keywords>
"USA"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.reuters.com/article/2011/01/10/us-usa-politics-christie-idUSTRE7094UQ20110110?feedType=RSS&feedName=politicsNews&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+Reuters/PoliticsNews+(News+/+US+/+Politics+News)&utm_content=Google+Reader>