To facilitate the explorations and innovations in this area, many MRC datasets have been established, such as SQuAD (Rajpurkar et al., 2016), MS MARCO (Nguyen et al., 2016), and Trivi-aQA (Joshi et al., 2017).
many pioneering MRC models have been proposed, such as BiDAF (Seo et al., 2016), R-NET (Wang et al., 2017), and QANet (Yu et al., 2018).