Complex sentence: Sokolov began studying the piano at the age of five and he entered the Leningrad Conservatory's special school for children at the age of seven to study with Leah Zelikhman, after graduating from the children's school he continued studying at the Conservatory with Moisey Khalfin.
Split into simpler sentences: Sokolov began studying the piano at the age of five and he entered the Leningrad Conservatory's special school for children at the age of seven to study with Leah Zelikhman. After graduating from the children's school he continued studying at the Conservatory with Moisey Khalfin.