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<http://webisa.webdatacommons.org/243996387>	<http://www.w3.org/ns/prov#value>	"Natural gas is a problem, Kessler said, because of leakage that occurs during drilling that sends methane gas into the atmosphere." .
<http://webisa.webdatacommons.org/243996387>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/243996387>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<upi.com> .