Relation dl#exact_location__exactlocation (entity,region)
  supertype:  generic_location__genericlocation
  inverse:  exact_location_of
  subtype:  location (entity,region)
     subtype:  physical_location (physical_endurant,physical_region)
        subtype:  spatial_location__spatiallocation (physical_endurant,space_region)
     subtype:  temporal_location (perdurant,temporal_region)
        subtype:  duration (perdurant,temporal_region)
  subtype:  e_temporal_location (endurant,temporal_region)
  subtype:  p_spatial_location__pspatiallocation (perdurant,space_region)
  subtype:  abstract_location (non-physical_endurant,abstract_region)
  subtype:  depends_on_spatial_location (non-physical_endurant,space_region)