<http://schema.org/keywords>
"Grupo%20Mexico%20S.A.B.%20de%20C.V.%20Series%20B"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wsj.com/articles/peru-approves-stalled-tia-maria-copper-mine-project-1407176876?mod=pls_whats_news_us_business_f>