<http://schema.org/url>
<http://s4.eestatic.com/2016/04/18/economia/mercados/Crisis_del_petroleo-OPEP-Iran-Arabia_Saudi-Venezuela-Rusia-Mercados_118248648_3829911_1706x640.jpg>
<http://www.elespanol.com/economia/mercados/20160418/118238196_0.html>