Update README.md

README.md

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 - en
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-RoBERTa-base fine-tuned on PoliClaim_{gold} and PoliClaim_{silver} proposed by [AFaCTA paper](https://arxiv.org/abs/2402.11073)
+RoBERTa-base fine-tuned on PoliClaim_{gold} and PoliClaim_{silver} proposed by [AFaCTA paper](https://arxiv.org/abs/2402.11073) .
+
+PoliClaim dataset can be found at https://github.com/EdisonNi-hku/AFaCTA
 
 To use it: provide the target sentence and its surrounding two sentences as contexts, where RoBERTa separating token <\/s> is used to separate sentences