<http://schema.org/url>
<http://www.technologyreview.com/news/508146/china-has-plenty-of-shale-gas-but-it-will-be-hard-to-mine/>
<http://www.technologyreview.com/news/508146/china-has-plenty-of-shale-gas-but-it-will-be-hard-to-mine/>