{"id":"S2003000050","label":"Otto cycle","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2003000050","normalized_label":"otto cycle","broader":["http://id.loc.gov/authorities/subjects/sh2003000209"],"aliases":["Cycle, Otto","Cycle, Spark-ignition combustion","Spark-ignition combustion cycle"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2003000050","provider":"lcsh","revision":"483cdd0a7398d0f5","taxonomy_revision":"f050b5d4780b1289","title":"Otto cycle","url":"/topics/S2003000050","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14411734338276319814","address_version":"morton4x16-v1","coordinates":[0,477,36203,51200],"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}