#degree_Centigrade__degree_Celsius__C  a degree on the Centigrade scale of temperature
  supertype:  #degree.temperature_unit  a unit of temperature on a specified scale; "the game was played in spite of the 40-degree temperature"
  subtype:  #standard_temperature  exactly zero degrees Centigrade
     subtype:  #STP__s.t.p.  standard temperature and pressure

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