#work_shift__shift__duty_period  the time period during which you are at work
  supertype:  #hours  a period of time assigned for work; "they work long hours"
  subtype:  #spell  #trick.work_shift  #watch.work_shift  #day_shift  #swing_shift  #graveyard_shift  #split_shift
  part of:  #workday__working_day__workingday  the amount of time that a worker must work for an agreed daily wage; "they work an 8-hour day"

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