Complex sentence: The role was originally played from November 1996 to the summer of 1997 by Tracy Lindsey Melchior, who was replaced after a handful of episodes by the late Candice Daly, who played the part until August 20,1998.
Split into simpler sentences: The role was originally played from late 1996 until the summer of 1997 by Tracy Lindsey Melchior. She was replaced after a handful of episodes by the late Candice Daly, who played the role until August 20,1998.