<http://schema.org/articleId>
"letterstotheeditorblog-13793"^^<http://www.w3.org/2001/XMLSchema#string>
<http://letterstotheeditorblog.dallasnews.com/2013/01/what-are-we-waiting-for-armageddon-readers-wonder-why-rep-joe-barton-denies-the-urgency-of-climate-change.html/>