About: http://webisa.webdatacommons.org/41302707

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	First wind and water mills, then spring and gravity engines such as clocks with springs and pendulums.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com