Complex sentence: The Pythian Games (also Delphic Games) were one of the four Panhellenic Games of Ancient Greece, a forerunner of the modern Olympic Games, held in honour of Apollo every four years at his sanctuary at Delphi.
Split into simpler sentences: The Pythian Games (also Delphic Games) were one of the four Panhellenic Games of Ancient Greece. They were held in honour of Apollo every four years at his sanctuary at Delphi.