About: http://webisa.webdatacommons.org/244051913

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	Back in the 60s, unless there was an instrument that could not easily be re-tuned, i.e. piano, organ, etc, featuring in the set, all guitars were tuned to each other, probably using the first one that was in tune.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com