{
  "_comment": "FILL FROM BROWSER: open https://opac.liart.ru/opacg/ then Поиск then Базовый; F12 Elements: input id=basic_<label> and select id=field_1 options. iddb: try 7..20 (1-4 not for GUEST, 7+ exist).",
  "iddb": null,
  "labels": {"author": "TBD", "title": "TBD", "free": "TBD"},
  "probe_labels": []
}