Update README.md

README.md

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 - ai-detection
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-This is a fine-tuned text classification model based on **RoBERTa-base** (see https://huggingface.co/roberta-base). The model is trained to detect machine-generated text, and is trained on generated scientific abstracts by **ChatGPT** and real abstracts of arxiv papers.
+This is a text classification model for detecting machine-generated text and is fine-tuned from **RoBERTa-base** (see https://huggingface.co/roberta-base). The model is trained on generated scientific abstracts by **ChatGPT** and real scientific abstracts of arxiv papers.