{"id":"S85042177","label":"Electromagnetic surface waves","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh85042177","normalized_label":"electromagnetic surface waves","broader":["http://id.loc.gov/authorities/subjects/sh85130731","http://id.loc.gov/authorities/subjects/sh93008779"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85042177","provider":"lcsh","revision":"33556518d02c196c","taxonomy_revision":"f050b5d4780b1289","title":"Electromagnetic surface waves","url":"/topics/S85042177","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"288243846243287552","address_version":"morton4x16-v1","coordinates":[0,20,18064,1024],"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}