<http://schema.org/mainEntityOfPage>
<http://online.wsj.com/articles/in-u-s-zoos-elephants-get-harder-to-find-1405102969>
<http://www.wsj.com/articles/in-u-s-zoos-elephants-get-harder-to-find-1405102969?mod=WSJ_newsreel_9>