About: http://webisa.webdatacommons.org/147198167

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	The racks???the valve racks???were built on top of the mercury delay tubes, which of course were an integral part of it, because you???ve got to slow it down from the speed of light to the speed of sound.
http://www.w3.org/ns/prov#wasQuotedFrom	ethw.org