#storage_tank__storagetank__tank  a large (usually metallic) vessel for holding gases or liquids
  supertype:  #vessel  an object used as a container (especially for liquids)
  subtype:  #aquarium__fish_tank__marine_museum__vivarium  a tank or pool or bowl filled with water for keeping live fish and underwater animals
     subtype:  #fishbowl__fish_bowl__goldfish_bowl  a transparent bowl in which small fish are kept
     subtype:  #Marineland  a commercial aquarium featuring trained dolphins
  subtype:  #water_tank__watertank__cistern  a tank that holds the water used to flush a toilet
  subtype:  #gas_holder__gasholder__gasometer  a large gas-tight spherical or cylindrical tank for holding gas to be used as fuel
  subtype:  #gas_tank__gastank__gasoline_tank  a tank for holding gasoline to supply a vehicle
  subtype:  #reservoir  tank used for collecting and storing a liquid (as water or oil)
     subtype:  #cistern  an artificial reservoir for storing liquids; especially an underground tank for storing rainwater
        subtype:  #cesspool__cesspit__sump  a covered cistern; waste water and sewage flow into it
        subtype:  #rain_barrel  a barrel used as a cistern to hold rainwater
     subtype:  #sump.reservoir  an oil reservoir in an internal combustion engine
     subtype:  #water_tower__watertower  a large reservoir for water
  subtype:  #septic_tank  large tank where solid matter or sewage is disintegrated by bacteria

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