Complex sentence: In 1990, the Pope named Detroit Archbishop Edmund Szoka to serve as a Vatican official, and subsequently chose Bishop Maida as his successor as Archbishop of Detroit on April 28 of that year.
Split into simpler sentences: In 1990, the Pope named Detroit Archbishop Edmund Szoka to serve as a Vatican official. The Pope subsequently chose Bishop Maida to be Cardinal Szoka's successor as Archbishop of Detroit on April 28 of that year.