About: http://webisa.webdatacommons.org/84731409

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	And 440 hz is a frequency that causes radiation, thats why many instruments have their keys changed to 440.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com