> ? [some #PO_Box_No]

[pm#graph1_on_address
     [any #address (^$(no inheritance)$^),
          may have for pm#street_name: a pm#string,
          may have for pm#street_No: a pm#street_No,
          may have for pm#housing_name: a pm#string,
          may have for pm#building_name: a pm#string,
          may have for pm#floor_No: a pm#floor_No,
          may have for pm#unit_No: a pm#unit_No,
          may have for pm#GPO/PMB_Box_No: a pm#GPO/PMB_Box_No,
          may have for pm#additional_address_details: a pm#string,
          may have for #district: a #district,
          may have for #region: a #region,
          may have for pm#region_PO_Box_No: a pm#region_PO_Box_No,
          may have for #country: a #country (^$(explore)$^)]
];

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