<http://webisa.webdatacommons.org/78288542>	<http://www.w3.org/ns/prov#value>	"Among the technical challenges that come with wells of this nature are measurement quality and materials, including seals, metals and fluids." .
<http://webisa.webdatacommons.org/78288542>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/78288542>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<drillingcontractor.org> .
<http://webisa.webdatacommons.org/prov/461203355>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/78288542> .