#fractional_process__fractionation  a process that uses heat to separate a substance into its components
  supertype:  natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  destructive_distillation__destructivedistillation  heating a solid substance in a closed container and collecting the volatile products
     subtype:  carbonization__carbonisation  the destructive distillation of coal (as in coke ovens)
  subtype:  fractional_distillation  fractionation of a liquid by distillation

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