Relation pm#relation_to_spatial_object (*,pm#spatial_object)  in WebKB, prefer using relations "from" a spatial object
  supertype:  pm#spatial_relation_to_entity_with_spatial_feature
  subtype:  pm#relation_to_another_spatial_object (pm#spatial_object,pm#spatial_object)
     subtype:  pm#location (pm#spatial_object,pm#spatial_object)
        subtype:  pm#address__addres (pm#spatial_object -> pm#spatial_object)
           subtype:  pm#main_address (pm#spatial_object -> pm#spatial_object)
           subtype:  pm#secondary_address__secondaryaddres (pm#spatial_object -> pm#spatial_object)
        subtype:  pm#above (pm#spatial_object -> pm#spatial_object)
           subtype:  pm#on (pm#spatial_object -> pm#spatial_object)
        subtype:  pm#below (pm#spatial_object,pm#spatial_object)
        subtype:  pm#near (pm#spatial_object -> pm#spatial_object)
           subtype:  pm#touching (pm#spatial_object -> pm#spatial_object)
        subtype:  pm#far_from__farfrom (pm#spatial_object,pm#spatial_object)
        subtype:  pm#exterior__in (pm#spatial_object -> pm#spatial_object)
        subtype:  pm#interior (pm#spatial_object,pm#spatial_object)
        subtype:  pm#before_location__before (pm#spatial_object,pm#spatial_object)
     subtype:  pm#spatial_part__spatialpart (pm#spatial_object,pm#spatial_object)
        subtype:  pm#physical_part (pm#physical_entity,pm#physical_entity)
  subtype:  sumo#where_fn__wherefn (sumo#physical,sumo#time_point -> sumo#region)  maps an object and a time_point at which the object exists to the region where the object existed at that time_point


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