About: http://webisa.webdatacommons.org/80949899

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Not just acoustic ones, as in the oil example, but also electromagnetic waves including visible light.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org