           Sentence ts They-returned in 1999, ater rebel raids: aia  Seightioring . Russiaw region: putt -w; series - of deailly  ‘oportwient-4 ana, ombinigs fast wiere blamed ax nls  tebels. :              Sewtence 2: In 1999, a, ace retuned after rebel’ ris gh:  6 eighboitring, Rustian, reijiow and -aserles ‘of dendly  apartment house bombings’ in: Rusiign, cities: thit: were.  Dblawed onthe rébéts                     