{"id":"S85120354","label":"Service life (Engineering)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85120354","normalized_label":"service life (engineering)","broader":["http://id.loc.gov/authorities/subjects/sh85112511"],"aliases":["Life, Service (Engineering)","Operating life (Engineering)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85120354","provider":"lcsh","revision":"4e9109d94848c1df","taxonomy_revision":"f050b5d4780b1289","title":"Service life (Engineering)","url":"/topics/S85120354","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9511813811364300292","address_version":"morton4x16-v1","coordinates":[0,20,19285,34816],"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}