<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Business_News/2012/12/22/Walgreen-profits-skid-in-first-quarter/53001356196489/>
<http://www.upi.com/Business_News/2012/12/22/Walgreen-profits-skid-in-first-quarter/UPI-53001356196489/?spt=mps&or=4>