 Complete the following phrase:  Nikita Vladimirovich Nagornyy , born 12 February 1997 in Rostov-on-Don, Rostov Oblast, Russia is a Russian artistic gymnast and two-time Olympian, representing Russia in 2016 and ROC in 2020. He was part of the teams who won gold at the 2020 Olympic Games and 2019 World Championships and silver at the 2016 Olympic Games and 