<http://webisa.webdatacommons.org/prov/507618612>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/54363412> .
<http://webisa.webdatacommons.org/54363412>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/54363412>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.ca> .
<http://webisa.webdatacommons.org/54363412>	<http://www.w3.org/ns/prov#value>	"In any event, the watermark is said to be present if cor(W,W')<c ???n, where c is a predetermined constant that depends on the application and level of security desired (e.g., c=4)." .