<http://webisa.webdatacommons.org/241157655>	<http://www.w3.org/ns/prov#value>	"Hydraulic fracturing is a process in which large volumes of water, sand and chemicals are injected at high pressure to extract oil and natural gas from underground rock formations." .
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<http://webisa.webdatacommons.org/241157655>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<kut.org> .