<http://schema.org/about>
"Earthquakes triggered by fluids injected deep underground, such as during the controversial practice of fracking, may be more common than previously thought, a"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/fracking-injection-process-linked-to-scores-of-earthquake>