Assertion: source's material | /r/HasProperty | non-fiction book
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text: This concept is contrasted with the unrelated concept of a secondary source , which is one where the material presented is based on some other original material, e.g., a non-fiction book analyzing original material such as news reports, and with a primary source , where the source is the wellspring of the original material, e.g., an autobiography or a politician's speech about his or her own campaign goals.