#source  a document (or organization) from which information is obtained; "the reporter had two sources for the story"
  supertype:  written_document__writtendocument__document__papers  writing that provides information (especially information of an official nature)
  subtype:  source_materials  publications from which information is obtained
  subtype:  fountainhead__well__wellspring  an abundant source; "she was a well of information"

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