{"id":"S87007243","label":"Gas separation membranes","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh87007243","normalized_label":"gas separation membranes","broader":["http://id.loc.gov/authorities/subjects/sh85083476"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh87007243","provider":"lcsh","revision":"36c69b274aa3a03b","taxonomy_revision":"f050b5d4780b1289","title":"Gas separation membranes","url":"/topics/S87007243","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4667079690186523136","address_version":"morton4x16-v1","coordinates":[0,20,48768,11264],"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}