Complex sentence: After his release, Popkov worked closely with Father Gleb Yakunin and other dissident reformers and in 1989 he was attacked in the street by a group of thugs after publishing an article abroad describing continued KGB influence over senior Russian Orthodox Church bishops.
Split into simpler sentences: After his release, Popkov worked closely with Father Gleb Yakunin and other dissident reformers. In 1989 he was attacked in the street by a group of thugs after publishing an article abroad describing continued KGB influence over senior Russian Orthodox Church bishops.