智能问答（Question Answering）的主要研究方向有哪些？

[EMNLP 2019] NumNet: Machine Reading Comprehension with Numerical Reasoning 数学类问题

[NAACL19] MathQA: Towards Interpretable Math Word Problem Solving with Operation-Based Formalisms

[NAACL19] BoolQ: Exploring the Surprising Difficulty of Natural Yes/No Questions

[EMNLP 2019] What's Missing: A Knowledge Gap Guided Approach for Multi-hop Question Answering

[EMNLP 2019] Self-Assembling Modular Networks for Interpretable Multi-Hop Reasoning

[EMNLP 2019] Avoiding Reasoning Shortcuts: Adversarial Evaluation, Training, and Model Development for Multi-Hop QA

[ACL 2019] Multi-Hop Paragraph Retrieval for Open-Domain Question Answering

[ACL 2019] Dynamically Fused Graph Network for Multi-hop Reasoning

[ACL 2019] Explore, Propose, and Assemble: An Interpretable Model for Multi-Hop Reading Comprehension

[ACL 2019] Multi-hop Reading Comprehension through Question Decomposition and Rescoring

[ACL 2019] Compositional Questions Do Not Necessitate Multi-hop Reasoning

[ACL 2019] Answering while Summarizing: Multi-task Learning for Multi-hop QA with Evidence Extraction

[ACL 2019] Cognitive Graph for Multi-Hop Reading Comprehension at Scale

[ACL 2019] Understanding Dataset Design Choices for Multi-hop Reasoning

[NAACL 2019] Repurposing Entailment for Multi-Hop Question Answering Tasks

[NAACL 2019] BAG: Bi-directional Attention Entity Graph Convolutional Network for Multi-hop Reasoning Question Answering

[ACL 2019] Exploiting Explicit Paths for Multi-hop Reading Comprehension

[ACL 2019] Multi-hop reading comprehension across multiple documents by reasoning over heterogeneous graphs

[EMNLP 2019] Cross-Lingual Machine Reading Comprehension

[EMNLP 2019] BiPaR: A Bilingual Parallel Dataset for Multilingual and Cross-lingual Reading Comprehension Novels

[ACL 2019] XQA: A Cross-lingual Open-domain Question Answering Dataset

[EMNLP 2019] Language Models as Knowledge Bases? 探索语言模型作为知识来源的可能性
[ACL 2019] Interpretable Question Answering on Knowledge Bases and Text

[ACL 2019] Enhancing Pre-Trained Language Representations with Rich Knowledge for Machine Reading Comprehension

[EMNLP 2019] Incorporating External Knowledge into Machine Reading for Generative Question Answering

[EMNLP 2019] BookQA: Stories of Challenges and Opportunities

[ACL 2019] Simple and Effective Curriculum Pointer-Generator Networks for Reading Comprehension over Long Narratives

[ACL 2019] ELI5: Long Form Question Answering

[ACL 2018] Multi-Passage Machine Reading Comprehension with Cross-Passage Answer Verification

[ACL 2019] Token-level Dynamic Self-Attention Network for Multi-Passage Reading Comprehension

[EMNLP 2019] Multi-passage BERT: A Globally Normalized BERT Model for Open-domain Question Answering

[ACL 2019] Retrieve, Read, Rerank: Towards End-to-End Multi-Document Reading Comprehension

[ACL 2019] Multi-hop reading comprehension across multiple documents by reasoning over heterogeneous graphs

[EMNLP19] PullNet: Open Domain Question Answering with Iterative Retrieval on Knowledge Bases and Text

[NAACL 2019] Enhancing Key-Value Memory Neural Networks for Knowledge Based Question Answering

[EMNLP 2017] QUINT: Interpretable Question Answering over Knowledge Bases

[ACL 2019] Interpretable Question Answering on Knowledge Bases and Text

[ACL 2019] Explore, Propose, and Assemble: An Interpretable Model for Multi-Hop Reading Comprehension

[AAAI 2019] Read + Verify: Machine Reading Comprehension with Unanswerable Questions

[ACL 2019] Learning to Ask Unanswerable Questions for Machine Reading Comprehension

[EMNLP 2019] BiPaR: A Bilingual Parallel Dataset for Multilingual and Cross-lingual Reading Comprehension on Novels 多语言与跨语言的小说阅读理解

[EMNLP 2019] GeoSQA: A Benchmark for Scenario-based Question Answering in the Geography Domain at High School Level 高中地理场景下的问答基准测试

[EMNLP 2019] Quoref: A Reading Comprehension Dataset with Questions Requiring Coreferential Reasoning 共指解析问题

[IJCAI 2019] AmazonQA: A Review-Based Question Answering Task 基于评论的问答

[EMNLP 2019] BiPaR: A Bilingual Parallel Dataset for Multilingual and Cross-lingual Reading Comprehension Novels 多语言和跨语言阅读理解小说的双语并行数据集

[ACL 2019] XQA: A Cross-lingual Open-domain Question Answering Dataset 跨语言开放域问答数据集

[ACL 2019] WEETQA: A Social Media Focused Question Answering Dataset 社交媒体问答数据集

[EMNLP 2019] A Span-Extraction Dataset for Chinese Machine Reading Comprehension 中文阅读跨度提取数据集