... MAP1R-Prec1MAP1,5R-Prec1,5MAP1,4,5R-Prec1,4,5QLM 0 .26 79 0.1941 0.3179 0 .29 63 0. 321 5 0.3057Lucene 0 .27 05 0 .20 02 0.3167 0 .29 56 0.31 92 0.3030WAQ 0.30 02 0 .21 49* 0.3557 0. 326 9 0.3583 0.3375WAQA 0.3000 0 .22 11 0.3640 0.3 328 0.3664 0.3405LSR ... 0.3405LSR 0.3046 0 .21 71* 0.3666 0.3 327 0.3 723 0.3464WAQ+WAQAPool0.30 62 0 .22 59 0.3685 0.3339 0.3716 0.3454WAQ+LSRPool0.3117 0 .22 24 0.3736 0.3399 0.3766 0.3487WAQA+LSRPool0.3135 0 .22 67 0.3818 ... contains 1 ,22 7,3 62 parallel pairsand will be referred to as WAQA (WikiAnswers Question- Answers) in the rest of the paper. Question Reformulations (WAQ) In this set-ting, question and question...