About: http://webisa.webdatacommons.org/362895553

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	Sometime around 1700, a fourth key ( G???) was added, and it was for this type of instrument that composers such as Antonio Vivaldi, Bach, and Georg Philipp Telemann wrote their demanding music.
http://www.w3.org/ns/prov#wasQuotedFrom	schools-wikipedia.org