<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Science_News/2012/07/10/Modern-cats-split-with-saber-tooths-early/58971341967711/>
<http://www.upi.com/Science_News/2012/07/10/Modern-cats-split-with-saber-tooths-early/UPI-58971341967711/>