#historic_period  an era of history having some distinctive feature
  supertype:  #era  a period marked by distinctive character or reckoned from a fixed point or event
  subtype:  #antiquity.historic_period  #middle_ages  #industrial_revolution  #reign.historic_period  #turn_of_the_century  #New_Deal.historic_period  #Reconstruction  #Restoration.historic_period
  instance:  #Renaissance  #Reign_of_Terror
  part of:  #history  the aggregate of past events: "a critical time in the school's history"

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