transformers pytorch pixel text-classification sentence-similarity dataset:gowitheflowlab/parallel-medium-w-nli dataset:gowitheflow/allnli-sup dataset:gowitheflow/wiki1M-character-level-all dataset:gowitheflow/wiki1M-word-condition-shuffle dataset:gowitheflow/wiki1M-word-character-all-multiple dataset:gowitheflow/wiki1M-word-random-shuffle dataset:gowitheflow/wiki-span arxiv:2402.08183 autotrain_compatible endpoints_compatible region:us