<http://schema.org/alternativeHeadline>
"Coal is a cornerstone of modern life, but its foundations pre-date the dinosaurs. Now, as we dig up and burn such ancient fossils faster than ever before, their ghosts are starting to haunt us."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/translating-uncle-sam/stories/where-does-coal-come-from>