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