<https://www.theguardian.com/environment/2014/may/15/most-dangerous-form-of-energy-coal>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.theguardian.com/environment/2014/may/15/most-dangerous-form-of-energy-coal#comment-35704945>