{"id":"S88007257","label":"Mine railroads--Track maintenance vehicles","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh88007257","normalized_label":"mine railroads--track maintenance vehicles","broader":["http://id.loc.gov/authorities/subjects/sh2006005717","http://id.loc.gov/authorities/subjects/sh85085521","http://id.loc.gov/authorities/subjects/sh93007664"],"aliases":["Mine railroads--Track maintenance cars","Track maintenance cars in mine railroads","Track maintenance vehicles in mine railroads"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh88007257","provider":"lcsh","revision":"ad8fdaa94f16c052","taxonomy_revision":"f050b5d4780b1289","title":"Mine railroads--Track maintenance vehicles","url":"/topics/S88007257","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5531625700286677508","address_version":"morton4x16-v1","coordinates":[0,20,64393,25600],"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}