{"id":"S87006249","label":"Middlesex Canal (Mass.)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh87006249","normalized_label":"middlesex canal (mass.)","broader":["http://id.loc.gov/authorities/subjects/sh85019452"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh87006249","provider":"lcsh","revision":"cc594f6888eda8b9","taxonomy_revision":"f050b5d4780b1289","title":"Middlesex Canal (Mass.)","url":"/topics/S87006249","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13890310988550767104","address_version":"morton4x16-v1","coordinates":[0,20,48752,41984],"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}