<http://webisa.webdatacommons.org/315890861>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/prov/454783406>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/315890861> .
<http://webisa.webdatacommons.org/315890861>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/315890861>	<http://www.w3.org/ns/prov#value>	"dust and other chemicals when contracted to clean and reassemble tanks" .