{"id":"S85115511","label":"Rotors (Helicopters)--Aerodynamics","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85115511","normalized_label":"rotors (helicopters)--aerodynamics","broader":["http://id.loc.gov/authorities/subjects/sh85001295"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85115511","provider":"lcsh","revision":"b63e2990a8c69c67","taxonomy_revision":"f050b5d4780b1289","title":"Rotors (Helicopters)--Aerodynamics","url":"/topics/S85115511","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10090535159507075588","address_version":"morton4x16-v1","coordinates":[0,20,19209,56320],"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}