<http://schema.org/datePublished>
"2013-05-15T21:17:48.000Z"^^<http://schema.org/Date>
<http://blogs.wsj.com/moneybeat/2013/05/15/buffetts-berkshire-hathaway-boosts-stakes-in-ibm-and-wells-fargo/?mod=WSJ_qtoverview_wsjlatest>