{"id":"S2013002601","label":"Free-spinning wind tunnels","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2013002601","normalized_label":"free-spinning wind tunnels","broader":["http://id.loc.gov/authorities/subjects/sh85146909"],"aliases":["Free-spinning vertical wind tunnels","Spin tunnels (Aeronautics)","Spin wind tunnels","Spinning tunnels (Aeronautics)","Spinning wind tunnels","Vertical wind tunnels, Free-spinning"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2013002601","provider":"lcsh","revision":"6ac8e5df1e14595b","taxonomy_revision":"f050b5d4780b1289","title":"Free-spinning wind tunnels","url":"/topics/S2013002601","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14177415492209370662","address_version":"morton4x16-v1","coordinates":[0,479,61421,41984],"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}