<http://schema.org/alternativeHeadline>
"Iron ore\u2014the rust-colored raw material key to steelmaking\u2014is the most important piece of mining giant Rio Tinto's business, accounting for more than 70% of the company's profit."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/43932/rio-tinto-scrapes-record-amount-of-iron-ore-from-earth-but-can-it-last/>