<http://schema.org/url>
<http://www.vanityfair.com/news/2013/02/largest-prime-number-discovered-people-excited-by-prime-number-news-still-awol>
<http://www.vanityfair.com/news/2013/02/Largest-Prime-Number-Discovered-People-Excited-By-Prime-Number-News-Still-AWOL>