sentence-transformers tensorboard safetensors xlm-roberta sentence-similarity feature-extraction dataset_size:100K<n<1M loss:CachedMultipleNegativesRankingLoss en arxiv:1908.10084 arxiv:2101.06983 base_model:Unbabel/xlm-roberta-comet-small base_model:finetune:Unbabel/xlm-roberta-comet-small model-index autotrain_compatible text-embeddings-inference endpoints_compatible region:us