<http://schema.org/url>
<http://www.wsj.com/articles/u-s-home-price-growth-remains-strong-in-july-case-shiller-says-1443532074>
<http://www.mansionglobal.com/es/articles/10657-los-precios-de-las-casas-en-ee-uu-se-mantienen-solidos>