Create README.md

README.md

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+Dataset
+The dataset used is a variant of the Persona-Chat dataset, which contains 19319 short dialogues in Greek.
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+Using the pre-trained gpt2-greek(https://huggingface.co/nikokons/gpt2-greek) model, we fine-tune the model on this Greek version of translated Persona-Chat dataset for 3 epochs until there is no progress in validation loss. The model's input is customized to the Greek version of the PERSONA-CHAT dataset to perform the fine-tuning procedure. A batch size of 4 is used, and gradients are accumulated over 8 iterations, resulting in a total batch size of 32. The Adam optimization scheme is used, with a learning rate of 5.7e-5.