{"id":"S85137411","label":"Triangulation signal towers","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85137411","normalized_label":"triangulation signal towers","broader":["http://id.loc.gov/authorities/subjects/sh85136296","http://id.loc.gov/authorities/subjects/sh85137410"],"aliases":["Signal towers, Triangulation"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85137411","provider":"lcsh","revision":"48654ea594a9e96d","taxonomy_revision":"f050b5d4780b1289","title":"Triangulation signal towers","url":"/topics/S85137411","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288454676595212800","address_version":"morton4x16-v1","coordinates":[0,20,19552,3072],"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}