<http://schema.org/url>
<http://www.businessweek.com/articles/2014-02-13/apple-supply-report-acknowledges-its-smartphones-and-tablets-rely-on-smelters-using-illegally-mined-tin>
<http://www.bloomberg.com/bw/articles/2014-02-13/apple-supply-report-acknowledges-its-smartphones-and-tablets-rely-on-smelters-using-illegally-mined-tin>