About: http://webisa.webdatacommons.org/126811914

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	You are right -- I have never heard of him before, although pretty clearly he was a contemporary of Arrau, Schnabel, Brailowsky, and other pianists who were better known at that time.
http://www.w3.org/ns/prov#wasQuotedFrom	pianoworld.com