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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.",
  "name": "Bob Obee",
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      "title": "4 Minds B2+ SB + DigiBook (kod)",
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    {
      "title": "I Wonder 6. Activity Book + Zeszyt ćwiczeń w wersji cyfrowej",
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    {
      "title": "FCE for Schools Practice Tests 2. Student's Book + kod DigiBook",
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      "slug": "fce-for-schools-practice-tests-2-students-book-kod-digibook",
      "url": "https://www.kolczanksiazek.pl/bob-obee/fce-for-schools-practice-tests-2-students-book-kod-digibook",
      "first_published": "2019-01-01",
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    {
      "title": "I Wonder 6. Pupil’s Book + Podręcznik w wersji cyfrowej",
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