{"id":"S85030650","label":"Concrete--Air content","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85030650","normalized_label":"concrete--air content","broader":[],"aliases":["Air in concrete"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85030650","provider":"lcsh","revision":"9bac160c8feac850","taxonomy_revision":"f050b5d4780b1289","title":"Concrete--Air content","url":"/topics/S85030650","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10124237116184871492","address_version":"morton4x16-v1","coordinates":[0,20,17883,59392],"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}