    Sentence 1:,Chechen officials -working  for the Moscow-backed government are]  ja frequent target for rebels and tension|  lis running high ahead of next Sunday ‘s|  jpresidential election in ‘war-torn  (Chechnya.    Sentence 2: Officials) in Chechnya ‘s  Moscow-backed government are aj  frequent target for rebels , and tension|  lis running high ahead) of Sunday '‘s|  presidential election in the war-ravaged]  region.         