#lights-out  a prescribed bedtime
  supertype:  #bedtime  the time you go to bed
  part of:  #nighttime__dark  the time after sunset and before sunrise while it is dark outside
     part of:  #day__meansolarday__twenty-four_hours__solar_day  time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day"
        part of:  #month  a time unit of 30 days; "he was given a month to pay the bill"
           part of:  #year  a period of time occupying a regular part of a calendar year that is used for some particular activity; "a school year"
        part of:  #calendar_month__month  one of the twelve divisions of the calendar year; "he paid the bill last month"

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