#sundown__sunset  the time in the evening at which the sun begins to fall below the horizon
  exclusion:  #dawn
  supertype:  #time_of_day__hour  clock time; "the hour is getting late"
  part of:  #eventide__evening__eve  the latter part of the day (the period of decreasing daylight from late afternoon until nightfall); "he enjoyed the evening light across the lake"

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