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    "name": "Kołczan Książek",
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    "url": "https://www.kolczanksiazek.pl"
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  "formats": "Każda podstrona ma dwie wersje z tymi samymi danymi: JSON (adres strony + .json) i markdown (adres strony + .md). Do każdego `url` w tym dokumencie można dopisać .json albo .md.",
  "title": "Avenger",
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    {
      "title": "Avenger",
      "subtitle": null,
      "url": "https://www.kolczanksiazek.pl/frederick-forsyth/en/avenger/9781407039718",
      "publisher": "Transworld Digital",
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  "other_languages": [
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      "title": "Vengador",
      "language": "es_ES",
      "url": "https://www.kolczanksiazek.pl/frederick-forsyth/es/vengador"
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    {
      "title": "Il vendicatore",
      "language": "it_IT",
      "url": "https://www.kolczanksiazek.pl/frederick-forsyth/it/il-vendicatore"
    },
    {
      "title": "Mściciel",
      "language": "pl_PL",
      "url": "https://www.kolczanksiazek.pl/frederick-forsyth/msciciel"
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  "characters": [],
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}