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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.",
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  "authors": [
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  "description": "Las colinas negras — Del Zorzal",
  "editions": [
    {
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      "title": "Μαύροι λόφοι",
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      "title": "Góry Czarne",
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