transformers pytorch bert question-answering DocVQA Document Question Answering Document Visual Question Answering en dataset:rubentito/mp-docvqa arxiv:2007.00398 arxiv:2212.05935 arxiv:1905.13648 base_model:google-bert/bert-large-uncased-whole-word-masking-finetuned-squad base_model:finetune:google-bert/bert-large-uncased-whole-word-masking-finetuned-squad license:gpl-3.0 endpoints_compatible region:us