#camp.prison_house  a prison for forced laborers; "China has many work camps for political prisoners"
  supertype:  prison_house__prison  a correctional institution where persons are confined while on trial or for punishment
  subtype:  prison_camp__internment_camp__prisoner_of_war_camp__POW_camp  camp for political prisoners or prisoners of war
     subtype:  gulag  a Russian prison camp for political prisoners
  subtype:  work_camp__prison_camp__prison_farm  camp for trustworthy prisoners employed in government projects

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