{"id":"S2006004120","label":"Underwater tunnels--Massachusetts","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2006004120","normalized_label":"underwater tunnels--massachusetts","broader":[],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2006004120","provider":"lcsh","revision":"38cca1745bbf4932","taxonomy_revision":"f050b5d4780b1289","title":"Underwater tunnels--Massachusetts","url":"/topics/S2006004120","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"900724333821961824","address_version":"morton4x16-v1","coordinates":[0,478,17606,24576],"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}