{"id":"S89004869","label":"BL Lacertae objects","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh89004869","normalized_label":"bl lacertae objects","broader":["http://id.loc.gov/authorities/subjects/sh85110574","http://id.loc.gov/authorities/subjects/sh86000789"],"aliases":["BL Lac objects","BL Lac-type objects","BL Lacs (Astronomy)","Blazars (Astronomy)","Lacertids"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh89004869","provider":"lcsh","revision":"acbf106b63f954cb","taxonomy_revision":"f050b5d4780b1289","title":"BL Lacertae objects","url":"/topics/S89004869","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"21471263138661894","address_version":"morton4x16-v1","coordinates":[0,21,14445,5120],"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}