{"id":"S85139609","label":"Underwater acoustics","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85139609","normalized_label":"underwater acoustics","broader":["http://id.loc.gov/authorities/subjects/sh85049397","http://id.loc.gov/authorities/subjects/sh85125363"],"aliases":["Acoustics, Underwater","Hydroacoustics","Underwater sound"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85139609","provider":"lcsh","revision":"ea3a1f931cf6e182","taxonomy_revision":"f050b5d4780b1289","title":"Underwater acoustics","url":"/topics/S85139609","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"900803489431683648","address_version":"morton4x16-v1","coordinates":[0,20,19586,25600],"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}