 Complete the following phrase:  Yezhov started working in cinema in 1953 and quickly turned into one of the most prolific screenwriters of the Soviet Union. He wrote and co-wrote over 50 screenplays, both for short and feature films. He worked in almost every genre, including documentaries. 1959 saw the release of the war drama Ballad of a Soldier directed by Grigori Chukhrai. The screenplay was co-written by Chukhrai and Yezhov, both war veterans. The film gained a lot of praise and gathered a handful of international awards, including the Special jury prize at the 