About: http://webisa.webdatacommons.org/341020081

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	Ebert was a well-known science fiction fan in the 1950s (Ed Gorman was acquainted with him then), and his letters appeared in letter columns in magazines like Amazing Stories and others.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com