{"id":"S2004007537","label":"Gases--Filtration","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2004007537","normalized_label":"gases--filtration","broader":["http://id.loc.gov/authorities/subjects/sh85048252"],"aliases":["Gases--Cleaning--Filtration","Gases--Purification--Filtration"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2004007537","provider":"lcsh","revision":"f94bbb7d81c56cf2","taxonomy_revision":"f050b5d4780b1289","title":"Gases--Filtration","url":"/topics/S2004007537","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14699828633757966854","address_version":"morton4x16-v1","coordinates":[0,477,51945,50176],"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}