Before revision:  The significant difference between humans and the best model (F1-score of 15.93\% ) on the test set of our corpus indicates that improvements in ViNewsQA can be explored in future research .
After revision:  The significant difference between humans and the best model (F1-score of 15.93\% ) on the test set of our corpus indicates that improvements in ViNewsQA can be explored in the future study .