{"id":"S85030745","label":"Concrete stoppings (Mining)--Airtightness","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85030745","normalized_label":"concrete stoppings (mining)--airtightness","broader":["http://id.loc.gov/authorities/subjects/sh85119312"],"aliases":["Air leakage in concrete stoppings (Mining)","Airtightness of concrete stoppings (Mining)","Leakage of air in concrete stoppings (Mining)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85030745","provider":"lcsh","revision":"85bfba2a361298d3","taxonomy_revision":"f050b5d4780b1289","title":"Concrete stoppings (Mining)--Airtightness","url":"/topics/S85030745","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"900733137934763524","address_version":"morton4x16-v1","coordinates":[0,20,17885,25600],"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}