About: http://webisa.webdatacommons.org/173145362

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	It is primarily used in Europe, especially in German-speaking countries and in repertory opera houses.The Fach system is a convenience for singers and opera houses.
http://www.w3.org/ns/prov#wasQuotedFrom	reference.com