{
  "type": "author",
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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.",
  "name": "Ludwik Van Beethoven",
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      "title": "Łatwy Beethoven na trąbkę z fortepianem",
      "subtitle": null,
      "slug": "latwy-beethoven-na-trabke-z-fortepianem",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/latwy-beethoven-na-trabke-z-fortepianem",
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    {
      "title": "Łatwy Beethoven. Na skrzypce z fortepianem",
      "subtitle": null,
      "slug": "latwy-beethoven-na-skrzypce-z-fortepianem",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/latwy-beethoven-na-skrzypce-z-fortepianem",
      "first_published": "2026-06-10",
      "series": null
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    {
      "title": "Najpiękniejszy Beethoven na fortepian",
      "subtitle": null,
      "slug": "najpiekniejszy-beethoven-na-fortepian",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/najpiekniejszy-beethoven-na-fortepian",
      "first_published": "2020-01-01",
      "series": null
    },
    {
      "title": "Oda do radości (4-głosowy chór dziecięcy a cappella)",
      "subtitle": null,
      "slug": "oda-do-radosci-4-glosowy-chor-dzieciecy-a-cappella",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/oda-do-radosci-4-glosowy-chor-dzieciecy-a-cappella",
      "first_published": "2008-06-26",
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    {
      "title": "Dla Elizy (na skrzypce)",
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      "slug": "dla-elizy-na-skrzypce",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/dla-elizy-na-skrzypce",
      "first_published": "2008-06-26",
      "series": null
    },
    {
      "title": "Dla Elizy na fortepian",
      "subtitle": null,
      "slug": "dla-elizy-na-fortepian",
      "url": "https://www.kolczanksiazek.pl/ludwik-van-beethoven/dla-elizy-na-fortepian",
      "first_published": "2008-01-01",
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    },
    {
      "title": "Dla Elizy",
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}