About: http://webisa.webdatacommons.org/269931500

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	Another official definition of a perpetual motion machine is a machine that produces more output than input.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org