Complex sentence: In 2016, King Bhumibol celebrated his Platinum jubilee of seventy years on the throne, the longest in Thai history, he died later the same year on the 13 October 2016.
Split into simpler sentences: In 2016, King Bhumibol celebrated his Platinum Jubilee of seventy years on the throne, the longest in Thai history. He died later the same year on the 13 October 2016.