{"id":"S86000452","label":"Roller compacted concrete","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh86000452","normalized_label":"roller compacted concrete","broader":["http://id.loc.gov/authorities/subjects/sh85030647"],"aliases":["Concrete, Roller compacted","RCC (Roller compacted concrete)","Rollcrete","Rolled concrete"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh86000452","provider":"lcsh","revision":"c9d531cf7b5ecbf7","taxonomy_revision":"f050b5d4780b1289","title":"Roller compacted concrete","url":"/topics/S86000452","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4613937835421091332","address_version":"morton4x16-v1","coordinates":[0,20,33037,4096],"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}