{"id":"S85110901","label":"Railroad tunnels","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85110901","normalized_label":"railroad tunnels","broader":["http://id.loc.gov/authorities/subjects/sh85138674"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85110901","provider":"lcsh","revision":"52c5de35f3b051f6","taxonomy_revision":"f050b5d4780b1289","title":"Railroad tunnels","url":"/topics/S85110901","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10090394405979685380","address_version":"morton4x16-v1","coordinates":[0,20,19137,54272],"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}