Complex sentence: In 2004, Sarah Fox made her North American debut as Zerlina ("Don Giovanni ") at the Cincinnati Opera and will sing a concert performance of"Athalia" at the Alice Tully Hall in May 2009.
Split into simpler sentences: In 2004, Sarah Fox made her North American debut as Zerlina (Don Giovanni) at the Cincinnati Opera. She will sing a concert performance of "Athalia" at the Alice Tully Hall in May 2009.