Complex sentence: In 1519 Duarte Barbosa went on the first trip of circumnavigation with Magellan, of whose brother-in-law he was, dying in May 1521 in the banquet trap of King Humabon in the island of Cebu in the Philippines.
Split into simpler sentences: In 1519 Duarte Barbosa went on the first circumnavigation with Magellan, his brother-in-law. He died in May 1521 in the banquet trap of King Humabon in the island of Cebu in the Philippines.