{"id":"S2002006237","label":"Motors--Mufflers--Acoustic properties","description":"Use as a topical subdivision under individual land vehicles and types of land vehicles.","source_url":"https://id.loc.gov/authorities/subjects/sh2002006237","normalized_label":"motors--mufflers--acoustic properties","broader":[],"aliases":["Acoustic properties of mufflers"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2002006237","provider":"lcsh","revision":"5feabc083b9c794f","taxonomy_revision":"f050b5d4780b1289","title":"Motors--Mufflers--Acoustic properties","url":"/topics/S2002006237","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"904106431588999750","address_version":"morton4x16-v1","coordinates":[0,477,20675,29696],"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}