<http://webisa.webdatacommons.org/prov/504890238>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/161982942> .
<http://webisa.webdatacommons.org/161982942>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<physics.info> .
<http://webisa.webdatacommons.org/161982942>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/161982942>	<http://www.w3.org/ns/prov#value>	"surface waves, which are what this discussion is a part of" .