{"id":"S85000597","label":"Acoustical materials","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85000597","normalized_label":"acoustical materials","broader":["http://id.loc.gov/authorities/subjects/sh85082065"],"aliases":["Acoustic materials","Soundproofing materials"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85000597","provider":"lcsh","revision":"12081d197d35551e","taxonomy_revision":"f050b5d4780b1289","title":"Acoustical materials","url":"/topics/S85000597","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"866956122408486464","address_version":"morton4x16-v1","coordinates":[0,20,17414,21504],"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}