[graph1_on_physical_entity
     [any physical_entity (^$(no inheritance)$^),
          physical_part: a physical_entity,
          matter: a substance,
          physical_part of: a physical_entity,
          location: a spatial_object,
          spatial_characteristic (^$(explore 1)$^): a spatial_attribute_or_quality_or_measure,
          physical_characteristic (^$(explore 2)$^): a physical_characteristic,
          may have for owner: a person_or_organization (^$(explore 1)$^),
          monetary_value: a monetary_value,
          may be object of: a commercial_transaction (^$(explore 1)$^),
          may be doer/object/result/place of (^$(explore)$^): a situation]
];