Complex sentence: Throughout the 1990s Cresswell performed regularly at the Lyric Opera of Chicago, and made important debuts with the New York City Opera, San Francisco Opera, Washington Opera, and the Teatro Colon in Buenos Aires.
Split into simpler sentences: Throughout the 1990s Cresswell performed regularly at the Lyric Opera of Chicago. During this time, he also made important debuts with the New York City Opera, San Francisco Opera, Washington Opera, and the Teatro Colon in Buenos Aires.