About: http://webisa.webdatacommons.org/288670190

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	His foundation???s immense collection of manuscripts, letters and other documents relating to the music of our time-a significant portion of which he commissioned himself-contains essential material from more than 50 composers.
http://www.w3.org/ns/prov#wasQuotedFrom	observer.com