<http://schema.org/mainEntityOfPage>
<http://www.huffingtonpost.co.uk/2012/03/27/mad-men-funny-poster-graffiti_n_1381746.html>
<http://www.huffingtonpost.co.uk/2012/03/27/mad-men-funny-poster-graffiti_n_1381746.html?ref=mostpopular>