Complex sentence: The service has a combination of Bitter Lamentations, Matins, and Vespers of the PNCC the clergy vested with cantors are seated at the high place and the service is chanted.
Split into simpler sentences: The service has a combination of Bitter Lamentations, Matins, and Vespers. Several of the PNCC clergy, vested with cantors, are seated at the high place and the service is chanted.