Bi-Directional Attention Flow for Machine Comprehension
Table 5: Variations of similarity function α (Equation 1) and fusion function β (Equation 2) and their performance on the dev data of SQuAD. See Appendix B for the details of each variation.
['[EMPTY]', 'EM', 'F1']
It is important to note that there are non-trivial gaps between our definition of α and other definitions employed by previous work. Adding MLP in β does not seem to help, yielding slightly worse result than β without MLP.