{"id":"S85002543","label":"Aids to air navigation--Defense measures","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85002543","normalized_label":"aids to air navigation--defense measures","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85002543","provider":"lcsh","revision":"f732d9aca34cf3e7","taxonomy_revision":"f050b5d4780b1289","title":"Aids to air navigation--Defense measures","url":"/topics/S85002543","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9550036941471352320","address_version":"morton4x16-v1","coordinates":[0,20,17444,48128],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}