# Closed circular ring problems { "id": "S94002163", "title": "Closed circular ring problems", "url": "/topics/S94002163", "kind": "topic-directory", "aeo_cohort": "topic-directory", "provider": "lcsh", "revision": "5744ea1aaa12b275", "catalogue_revision": "f050b5d4780b1289", "numeric_address": "10106297483396269668", "address_version": "morton4x16-v1", "coordinates": [ 0, 22, 26991, 52224 ], "answer_status": "Directory metadata; local answer requires separate source review", "truth_status": "Subject descriptor, not a factual answer or a demonstrated knowledge gap" } Directory metadata is not a factual answer or evidence of a global knowledge gap. Source: https://id.loc.gov/authorities/subjects/sh94002163 No owner-reviewed local answer yet.