Complex sentence: The Catholic Church teaches that it is the one true Church founded by Jesus Christ, that its bishops are the successors of Christ's apostles and that the Pope is the sole successor to Saint Peter who has apostolic primacy.
Split into simpler sentences: The Catholic Church teaches that it is the one true Church founded by Jesus Christ. It additionally teaches that its bishops are the successors of Christ's apostles and that the Pope is the sole successor to Saint Peter who has apostolic primacy.