{"id":"S87007317","label":"Dark matter (Astronomy)","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh87007317","normalized_label":"dark matter (astronomy)","broader":["http://id.loc.gov/authorities/subjects/sh85067526"],"aliases":["Nonluminous matter (Astronomy)","Unobserved matter (Astronomy)","Unseen matter (Astronomy)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh87007317","provider":"lcsh","revision":"fc9c72672e10c2be","taxonomy_revision":"f050b5d4780b1289","title":"Dark matter (Astronomy)","url":"/topics/S87007317","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"5209622707796312580","address_version":"morton4x16-v1","coordinates":[0,20,48769,21504],"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}