<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Sports_News/2014/01/13/Serena-Williams-posts-solid-first-round-win-in-Australia/99591389614802/>
<http://www.upi.com/Sports_News/2014/01/13/Serena-Williams-posts-solid-first-round-win-in-Australia/UPI-99591389614802/>