#factor  anything that contributes causally to a result; "a number of factors determined the outcome"
  supertype:  #cause  events that provide the generative force that is the origin of something; "they are trying to determine the cause of the crash"
  subtype:  #parameter  any factor that defines a system and determines (or limits) its performance
     subtype:  is#subroutine_parameter
  subtype:  #unknown_quantity__unknownquantity  a factor in a given situation whose bearing and importance is not apparent; "I don't know what the new man will do; he's still an unknown quantity"
  subtype:  #releasing_factor__releasingfactor__releasing_hormone__releasinghormone__RF  a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland
     subtype:  #growth_hormone-releasing_factor__GHRF  a releasing factor that accelerates the secretion of growth hormone by the anterior pituitary body
  subtype:  #intrinsic_factor__intrinsicfactor  a substance produced by the mucosa of the stomach and intestines that is essential for the absorption of vitamin B12; "lack of intrinsic factor can result in pernicious anemia"
  subtype:  pm#human_factor__humanfactor

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