Update README.md

README.md

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   - split: validation
     path: data/validation-*
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+This dataset is created to train language models on their retrieval and re-ranking abilities. More detailed information can be found at our publication: [Advancing Vietnamese Information Retrieval with Learning Objective and Benchmark](https://arxiv.org/abs/2503.07470).
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+Please cite this paper if you want to use it for your work.