 Complete the following phrase:  Korolev was also connected to both the Soviet Union national ice hockey team and the Soviet Union national junior ice hockey team. From 1964 to 1992, he was head of the research group for the national mens team, and contributed to the team winning seventeen Ice Hockey World Championships and seven Winter Olympic Games gold medals. At the end of his tenure, he was head coach of the national team from 1990 and 1992. At the 