{"id":"S85068149","label":"Ductile iron","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85068149","normalized_label":"ductile iron","broader":["http://id.loc.gov/authorities/subjects/sh85020635"],"aliases":["Ductile cast iron","Iron, Nodular","Nodular cast iron","Nodular iron","Spheroidal graphite cast iron","Spheroidal graphite iron"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85068149","provider":"lcsh","revision":"5b6b642556c46915","taxonomy_revision":"f050b5d4780b1289","title":"Ductile iron","url":"/topics/S85068149","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"10090394129965123076","address_version":"morton4x16-v1","coordinates":[0,20,18469,54272],"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}