Complex sentence: Kirill Pokrovsky participated in several musical projects and bands in his early years before "Perestrojka", but he is best known as former band member of the first major Russian heavy metal bands Aria (band) and Master Rock group.
Split into simpler sentences: Kirill Pokrovsky participated in several musical projects and bands in his early years before "Perestrojka". He is best known as former band member of the first major Russian heavy metal bands Aria (band) and Master Rock group.