{"id":"S2003007019","label":"Radio waves--Attenuation","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2003007019","normalized_label":"radio waves--attenuation","broader":["http://id.loc.gov/authorities/subjects/sh2003007020"],"aliases":["Radio attenuation","Radio wave attenuation"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2003007019","provider":"lcsh","revision":"17ede11d7777b5b7","taxonomy_revision":"f050b5d4780b1289","title":"Radio waves--Attenuation","url":"/topics/S2003007019","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"13871311180154692098","address_version":"morton4x16-v1","coordinates":[0,477,36312,44032],"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}