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    <title>The Hobbit</title>
    <author>J.R.R. Tolkien</author>
    <price currency="USD">8.99</price>
    <isbn>0261102214</isbn>
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  <book id="bk102" lang="fr">
    <title>Le Petit Prince</title>
    <author>Antoine de Saint-Exupéry</author>
    <price currency="EUR">7.50</price>
    <isbn>0156012197</isbn>
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