{"id":"S85067340","label":"Spark ignition engines--Valve gears","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85067340","normalized_label":"spark ignition engines--valve gears","broader":["http://id.loc.gov/authorities/subjects/sh85053623"],"aliases":["Valve gears in spark ignition engines"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85067340","provider":"lcsh","revision":"0a9bc6b810de0fcc","taxonomy_revision":"f050b5d4780b1289","title":"Spark ignition engines--Valve gears","url":"/topics/S85067340","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"326581341728948740","address_version":"morton4x16-v1","coordinates":[0,20,18457,12288],"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}