<http://schema.org/url>
<http://www.mnn.com/health/fitness-well-being/stories/childhood-obesity-linked-to-poor-math-skills>
<http://www.mnn.com/health/fitness-well-being/stories/childhood-obesity-linked-to-poor-math-skills?magic_tabs_comment_callback_tab=0&referer=node%2F143983&args=a%3A1%3A%7Bi%3A0%3Bs%3A6%3A%22143983%22%3B%7D>