 Complete the following phrase:  Daria Sergeyevna Spiridonova-Nagornaya , born 8 July 1998 is a Russian former artistic gymnast. Primarily an uneven bars specialist, she is the 2015 World Champion, the 2015 European Champion, the 2014 World bronze medalist, and a four-time Russian national 2014-17 champion on the apparatus. She represented Russia at the 2016 Summer Olympics, winning a silver medal in the team competition. She was also a member of the gold-medal-winning team at the 