About: http://webisa.webdatacommons.org/233397029

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	When in 1929 Andy Kirk took over Terrence Holder???s band, of which John was a member, Mary Lou Williams served the group as deputy pianist and arranger until April 1930, at which time she became a regular member.
http://www.w3.org/ns/prov#wasQuotedFrom	duke.edu