A Russian court on Tuesday convicted four journalists of extremism for working for an anti-corruption group founded by the late opposition leader Alexei Navalny and sentenced them to 5 1/2 years in prison each. Antonina Favorskaya, Kostantin Gabov, Sergey Karelin and Artyom Kriger were found guilty of involvement with a group that had been labeled as extremist. All four had maintained their innocence, arguing they were being prosecuted for doing their jobs as journalists.