transformers llama merge mix cot text-generation dataset:mlabonne/guanaco-llama2-1k arxiv:2009.03300 arxiv:1803.05457 arxiv:1905.07830 arxiv:2109.07958 base_model:MayaPH/GodziLLa2-70B base_model:finetune:MayaPH/GodziLLa2-70B license:llama2 region:us