pm#living_entity_attribute_or_quality_or_measure
  supertype:  pm#physical/spatial_attribute_or_quality_or_measure  e.g., mass/length/color measure; here are most of the subtypes of #property.attribute, e.g., #visual_property
  subtype:  pm#date_of_birth__D.O.B.___birthdate__birthdate  not a birthday

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