transformers pytorch safetensors llama text-generation ja en dataset:mc4 dataset:wikipedia dataset:EleutherAI/pile dataset:oscar-corpus/colossal-oscar-1.0 dataset:cc100 arxiv:2307.09288 arxiv:2404.01657 base_model:meta-llama/Llama-2-7b-hf base_model:finetune:meta-llama/Llama-2-7b-hf license:llama2 model-index autotrain_compatible text-generation-inference region:us