Besides surface matching, a significant portion of questions require multiple-sentence reasoning and external knowledge (Richardson et al., 2013;Mostafazadeh et al., 2016;Khashabi et al., 2018;Ostermann et al., 2018).
we map three most common speaker abbreviations (i.e., ''M''; ''W'' and ''F'') that appear in dialogues to their eight most common corresponding mentions (i.e., ''man,'' ''boy,'' ''he,'' and ''his''; ''woman,'' ''girl,'' ''she,'' and ''her'') in questions.