<http://webisa.webdatacommons.org/prov/465770668>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/181170094> .
<http://webisa.webdatacommons.org/181170094>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/181170094>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/16457446>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/181170094> .
<http://webisa.webdatacommons.org/181170094>	<http://www.w3.org/ns/prov#value>	"The present invention relates to methods and apparatus for completing and maintaining subterranean wells for producing oil, gas and other fluids and minerals from the earth." .
<http://webisa.webdatacommons.org/prov/120054182>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/181170094> .