{"id":"S2018003040","label":"Autoclaved aerated concrete","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2018003040","normalized_label":"autoclaved aerated concrete","broader":["http://id.loc.gov/authorities/subjects/sh85002632"],"aliases":["AAC (Autoclaved aerated concrete)","Aerated concrete, Autoclaved","Aircrete (Trademark)","Celcon (Trademark)","Durox (Trademark)","Thermalite","Topblock"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2018003040","provider":"lcsh","revision":"3f8df35e3a5af51d","taxonomy_revision":"f050b5d4780b1289","title":"Autoclaved aerated concrete","url":"/topics/S2018003040","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"9241386461710778374","address_version":"morton4x16-v1","coordinates":[0,481,8481,32768],"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}