{"id":"S85076878","label":"Light--Speed","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85076878","normalized_label":"light--speed","broader":["http://id.loc.gov/authorities/subjects/sh85126486"],"aliases":["Speed of light","Velocity of light"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85076878","provider":"lcsh","revision":"ccdff0078087f68d","taxonomy_revision":"f050b5d4780b1289","title":"Light--Speed","url":"/topics/S85076878","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"326722080294979136","address_version":"morton4x16-v1","coordinates":[0,20,18606,14336],"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}