About: http://webisa.webdatacommons.org/94527865

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	The songs derived from many sources, including hymns and gospel songs, blues, and barbershop quartet songs, and they were often improvised.
http://www.w3.org/ns/prov#wasQuotedFrom	ncpedia.org