About: http://webisa.webdatacommons.org/129113110

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	Although tachometers are installed on machinery, such as generators and engines, you may need to determine the speed of a rotating machine that is not equipped with a tachometer.
http://www.w3.org/ns/prov#wasQuotedFrom	rfcafe.com