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  * The dataset is in `.parquet` format.
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  ## Dataset Details
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  ### Dataset Description
 
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  * The dataset is in `.parquet` format.
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+ > [!NOTE]
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+ > **k-core** means that every user and every item has at least k interactions across **ALL categories combined**.
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+ > This condition may not hold within a single category.
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  ## Dataset Details
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  ### Dataset Description