{"id":"S85076938","label":"Lightweight concrete","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85076938","normalized_label":"lightweight concrete","broader":["http://id.loc.gov/authorities/subjects/sh85030647"],"aliases":["Cellular concrete","Concrete, Lightweight","No-fines concrete","Pervious concrete","Porous concrete"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85076938","provider":"lcsh","revision":"764ad765740a9a49","taxonomy_revision":"f050b5d4780b1289","title":"Lightweight concrete","url":"/topics/S85076938","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"324470280481293892","address_version":"morton4x16-v1","coordinates":[0,20,18607,10240],"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}