sentence-transformers safetensors roberta sentence-similarity feature-extraction generated_from_trainer dataset_size:574417 loss:MultipleNegativesRankingLoss loss:CosineSimilarityLoss arxiv:1908.10084 arxiv:1705.00652 base_model:jhgan/ko-sroberta-multitask base_model:finetune:jhgan/ko-sroberta-multitask model-index autotrain_compatible text-embeddings-inference endpoints_compatible region:us