Relation pm#where_relation__whererelation (*)  where, from/to where, ...
  supertype:  pm#wh-/how_relation  this type permits to categorize relations according to the usual who/what/why/where/when/how questions ; this is a traditional but very subjective and ineffective way of categorizing relations 
  subtype:  pm#from/to (pm#situation,pm#entity)
     subtype:  pm#source (pm#situation,pm#causal_entity)
     subtype:  pm#recipient (pm#situation,pm#entity)
        subtype:  pm#beneficiary (pm#situation,pm#causal_entity)
     subtype:  pm#from/to_place__from/toplace (pm#process -> pm#spatial_object)
        subtype:  pm#from_place (pm#process -> pm#spatial_object)
        subtype:  pm#to_place__destination (pm#process -> pm#spatial_object)
        subtype:  pm#via_place__viaplace__via (pm#process -> pm#spatial_object)
        subtype:  pm#path (pm#process -> pm#spatial_object)
     subtype:  sumo#origin__from (sumo#process,sumo#object)  the 2nd argument (which must be present at least at the beginning of the process) indicates where the process began; for example, the submarine is the origin in 'the missile was launched from a submarine'
     subtype:  sumo#destination__to (sumo#process,pm#entity)  the 2nd parameter is the target or goal of the process; for example, Danbury would be the destination in 'Bob went to Danbury'; this is a very general case_role which, in particular, that it covers the concepts of 'recipient' and 'beneficiary'; thus, John would be the destination in 'Tom gave a book to John'
  subtype:  pm#place (pm#situation -> pm#spatial_object)
  subtype:  pm#path_length (pm#process -> pm#spatial_attribute_or_quality_or_measure)
  subtype:  pm#within_group (pm#situation,pm#collection)
  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:  pm#spatial_origin__spatialorigin (?,?)
     subtype:  pm#cuisine_origin__cuisineorigin (?,?)