Complex sentence: The last resident Greek-Catholic priest in Constantinople died in 1997 and has not since been replaced, and the only regular services in the Greek-Catholic Church of the Holy Trinity there are held by exiled Chaldean Catholics living in the city.
Split into simpler sentences: The last resident Greek-Catholic priest in Constantinople died in 1997 and has not since been replaced. The only regular services in the Greek-Catholic Church of the Holy Trinity there are held by exiled Chaldean Catholics living in the city.