<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Science_News/Technology/2012/04/01/Internet-tracking-brings-privacy-concerns/46291333272660/>
<http://www.upi.com/Science_News/Technology/2012/04/01/Internet-tracking-brings-privacy-concerns/UPI-46291333272660/?rel=28231336296660>