PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hermann Ebbinghaus, the German psychologist who first described terms such as the ???learning curve??? and the ???forgetting curve???, studied the effectiveness of spaced practice as far back as 1885.
http://www.w3.org/ns/prov#wasQuotedFrom
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