Complex sentence: Manilow released a number of cover tunes during the 1990s, starting with the 1989 release "Barry Manilow", and ontinuing with his 1990 Christmas LP "Because It's Christmas".
Split into simpler sentences: Manilow released a number of cover tunes during the 1990s. It started with the 1989 release "Barry Manilow", continued with his 1990 Christmas LP "Because It's Christmas".