Neural techniques question answering have improved (Devlin et al., 2018) machine reading comprehension (Rajpurkar et al., 2016, MRC): computers can take a single question and extract answers from datasets like Wikipedia.
qA models struggle to generalize when questions do not look like the standalone questions systems in training data: e.g., new genres, languages, or closely-related tasks (Yogatama et al., 2019).