#head_ache__headache__cephalalgia  pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
  subtype:  #histamine_headache  #migraine  #sick_headache  #sinus_headache  #tension_headache
  supertype:  #ache__aching  a dull persistent (usually moderately intense) pain
     supertype:  #pain__hurting  a symptom of some physical hurt or disorder; "the patient developed severe pain and distension"
        supertype:  #symptom  (medical) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease
           supertype:  #evidence.situation__grounds  your basis for belief or disbelief; knowledge on which to base belief; "the evidence that smoking causes lung cancer is very compelling"
              supertype:  pm#situation_playing_some_role  e.g., a causal situation
                 supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                 supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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