{"id":"S85107492","label":"Propellers, Variable pitch","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85107492","normalized_label":"propellers, variable pitch","broader":["http://id.loc.gov/authorities/subjects/sh85107486"],"aliases":["Controllable pitch propellers","Variable pitch propellers"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85107492","provider":"lcsh","revision":"a52cca443e0cc1eb","taxonomy_revision":"f050b5d4780b1289","title":"Propellers, Variable pitch","url":"/topics/S85107492","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9513924857516148224","address_version":"morton4x16-v1","coordinates":[0,20,19084,36864],"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}