<http://webisa.webdatacommons.org/225997172>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/225997172>	<http://www.w3.org/ns/prov#value>	"The introduction of these materials into the well commonly causes problems including plugging and erosion." .
<http://webisa.webdatacommons.org/prov/433212467>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/225997172> .
<http://webisa.webdatacommons.org/225997172>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .