Therefore, we need to find the answer span a t in the target language, by matching with a s in the source language s. We overviewed a highprecision baseline  where a s and p s are independently translated, and a t is found only when the translation of a s is exactly and consecutively found in that of p s .
our method is extensible to any language with an existing open-source NMT, leveraging only its attention scores (Bahdanau et al., 2014).