Original sentence: At age five, he enrolled in the Gnessin Special School of Music in Moscow where his primary teacher was Tatiana Zelikman.In June 2005 he won the Van Cliburn International Piano Competition.The next year, in 1999, he won the Busoni Competition, after several years in which the first prize had not been awarded because no competitor's performances had been deemed worthy
Edited sentence: At age five, he enrolled in the prestigious Gnessin Special School of Music in Moscow where his primary teacher was Tatiana Zelikman.In June 2005, he won his most prestigious competition yet, the 2005 Van Cliburn International Piano Competition.The next year, in 1999, he won the prestigious Busoni Competition, after several years in which the first prize had not been awarded because no competitor's performances had been deemed worthy