Relation dl#mediated_relation (dl#entity,dl#entity)
  supertype:  dl#conceptual_relation
  inverse:  dl#mediated_relation
  subtype:  dl#present_at__presentat (dl#endurant,dl#time_interval)
  subtype:  dl#q_present_at__qpresentat (dl#physical_quality,dl#time_interval)
  subtype:  dl#happens_at__happensat (dl#perdurant,dl#time_interval)
  subtype:  dl#overlaps (dl#entity,dl#entity)
  subtype:  dl#sibling_part__siblingpart (dl#entity,dl#entity)
  subtype:  dl#proper_part (dl#entity,dl#entity)  the subpart is different from the whole
  subtype:  dl#generic_location__genericlocation (dl#entity,dl#entity)
     subtype:  dl#exact_location__exactlocation (dl#entity,dl#region)
        subtype:  dl#location (dl#entity,dl#region)
           subtype:  dl#physical_location (dl#physical_endurant,dl#physical_region)
              subtype:  dl#spatial_location__spatiallocation (dl#physical_endurant,dl#space_region)
           subtype:  dl#temporal_location (dl#perdurant,dl#temporal_region)
              subtype:  dl#duration (dl#perdurant,dl#temporal_region)
        subtype:  dl#e_temporal_location (dl#endurant,dl#temporal_region)
        subtype:  dl#p_spatial_location__pspatiallocation (dl#perdurant,dl#space_region)
        subtype:  dl#abstract_location (dl#non-physical_endurant,dl#abstract_region)
        subtype:  dl#depends_on_spatial_location (dl#non-physical_endurant,dl#space_region)
  subtype:  dl#depends_on__dependson (dl#endurant,dl#quality_or_endurant_or_perdurant)
     subtype:  dl#physically_depends_on (dl#endurant,dl#PQ_or_PED_or_PR_or_PD)
     subtype:  dl#descriptively_depends_on__descriptivelydependson (dl#endurant,dl#non-physical_endurant)
  subtype:  dl#host (dl#feature,dl#entity)