{"id":"S2002004630","label":"Polystyrene","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2002004630","normalized_label":"polystyrene","broader":["http://id.loc.gov/authorities/subjects/sh85129392","http://id.loc.gov/authorities/subjects/sh85134811"],"aliases":["Polymerized styrene","Styrenic polymers"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2002004630","provider":"lcsh","revision":"5e307301bddfe032","taxonomy_revision":"f050b5d4780b1289","title":"Polystyrene","url":"/topics/S2002004630","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"868209575902470722","address_version":"morton4x16-v1","coordinates":[0,477,20650,22528],"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}