Complex sentence: One of the most powerful rulers of the Chola kingdom was Raja Raja Chola, who ruled from 985 to 1014 CE. His army conquered the Navy of the Cheras at Thiruvananthapuram, and annexed Anuradhapura and the northern province of Ceylon.
Split into simpler sentences: One of the most powerful rulers of the Chola kingdom was Raja Raja Chola. He ruled from 985 to 1014 CE. His army conquered the Navy of the Cheras at Thiruvananthapuram, and annexed Anuradhapura and the northern province of Ceylon.