Complex sentence: The debut album, "Boston", released on August 25,1976, ranks as one of the best-selling debut albums in U.S. history with over 17 million copies sold.
Split into simpler sentences: The debut album, "Boston", released on August 25,1976, was an enormous success. The record ranks as one of the best-selling debut albums in U.S. history with over 17 million copies sold.