Complex sentence: For the past 15 years the productions have been directed by Mrs. Toni Kartsonas, but starting with the 2006 season, the plays have been directed by Mrs. Denise Coppola and Mr. Christopher Corbo.
Split into simpler sentences: For the past 15 years the productions have been directed by Mrs. Toni Kartsonas. The plays are currently directed by Mrs. Denise Coppola and Mr. Christopher Corbo.