<http://webisa.webdatacommons.org/60507240>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<marinelink.com> .
<http://webisa.webdatacommons.org/prov/255133566>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/60507240> .
<http://webisa.webdatacommons.org/60507240>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/60507240>	<http://www.w3.org/ns/prov#value>	"The folks at De Donge caution that their productivity predictions can be influenced by factors such as resistance of the bottom, barge availability and operator experience." .