sentence-transformers safetensors xlm-roberta mteb sentence-similarity feature-extraction dataset_size:100K<n<1M loss:AnglELoss arxiv:1908.10084 arxiv:2309.12871 base_model:sentence-transformers/paraphrase-multilingual-mpnet-base-v2 base_model:finetune:sentence-transformers/paraphrase-multilingual-mpnet-base-v2 model-index autotrain_compatible text-embeddings-inference endpoints_compatible region:us