{"id":"S85111058","label":"Concrete railroad ties","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85111058","normalized_label":"concrete railroad ties","broader":["http://id.loc.gov/authorities/subjects/sh85030740","http://id.loc.gov/authorities/subjects/sh85111057"],"aliases":["Railroads--Ties, Concrete"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85111058","provider":"lcsh","revision":"f49872f9bf919edc","taxonomy_revision":"f050b5d4780b1289","title":"Concrete railroad ties","url":"/topics/S85111058","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"864902510706558464","address_version":"morton4x16-v1","coordinates":[0,20,19140,18432],"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}