{"id":"S2002006240","label":"Motors--Pistons and piston rings","description":"Use as a topical subdivision under individual land vehicles and types of land vehicles.","source_url":"https://id.loc.gov/authorities/subjects/sh2002006240","normalized_label":"motors--pistons and piston rings","broader":[],"aliases":["Piston rings of motors","Pistons of motors"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2002006240","provider":"lcsh","revision":"7989bd8ec6bff94a","taxonomy_revision":"f050b5d4780b1289","title":"Motors--Pistons and piston rings","url":"/topics/S2002006240","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9512728323214680646","address_version":"morton4x16-v1","coordinates":[0,477,20675,32768],"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}