{"id":"S2020011605","label":"Particulate matter","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2020011605","normalized_label":"particulate matter","broader":["http://id.loc.gov/authorities/subjects/sh85002574","http://id.loc.gov/authorities/subjects/sh85082246","http://id.loc.gov/authorities/subjects/sh85124647"],"aliases":["Airborne particulate matter","Ambient particulate matter","Particulate air pollutants","Ultrafine fibers","Ultrafine particles","Ultrafine particulate matter"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2020011605","provider":"lcsh","revision":"5136f44a39c106ae","taxonomy_revision":"f050b5d4780b1289","title":"Particulate matter","url":"/topics/S2020011605","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5191603937586987014","address_version":"morton4x16-v1","coordinates":[0,481,39865,21504],"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}