Assertion: nostalgia | /r/HasProperty | based on a remembrance of confidence
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Source sentences:
text: The nostalgia for this period was based on a remembrance of confidence in American life that had emerged during the period due to such factors as a sense that the frontier had finally been "conquered", with the U.S. Census Bureau's declaration that it was "closed" in 1890, as well as the recent victory in the Spanish–American War.