<http://webisa.webdatacommons.org/213717044>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/213717044>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/336573166>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/213717044> .
<http://webisa.webdatacommons.org/213717044>	<http://www.w3.org/ns/prov#value>	"canals and other structures that control the flow of water through the Chicago metropolitan area." .