Complex sentence: Besides being a rival of Rajah Humabon of Cebu, little is known about the life of Lapu-Lapu and the only existing documents about his life are those written by Antonio Pigafetta.
Split into simpler sentences: Besides being a rival of Rajah Humabon of Cebu, little is known about the life of Lapu-Lapu. The only existing documents about his life are those written by Antonio Pigafetta.