{"id":"S2004001068","label":"Two-photon absorbing materials","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2004001068","normalized_label":"two-photon absorbing materials","broader":["http://id.loc.gov/authorities/subjects/sh85092328","http://id.loc.gov/authorities/subjects/sh85095155"],"aliases":["Absorbing materials, Two-photon","TPA materials"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2004001068","provider":"lcsh","revision":"0c2043de22fc61ec","taxonomy_revision":"f050b5d4780b1289","title":"Two-photon absorbing materials","url":"/topics/S2004001068","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"14161639682122851842","address_version":"morton4x16-v1","coordinates":[0,477,51844,45056],"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}