About: http://webisa.webdatacommons.org/243252245

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	In his talk, Barker showed three vials of radium salts, as well as a radiograph of a mouse, all of which he obtained from W. J. Hammer (1859-1934), author of the 1903 book, Radium and other radioactive substances.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com