About: http://webisa.webdatacommons.org/40176415

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	For periods including years or months the number of seconds is averaged.
http://www.w3.org/ns/prov#wasQuotedFrom	keith-wood.name