Complex sentence: On 5 April 2005, she died of pneumonia at a hospital in Iizuka, as the 4th oldest person in the world, aged 114 years 218 days.
Split into simpler sentences: On 5 April 2005, she died of pneumonia at a hospital in Iizuka. At the time of her death, Koyama was the 4th oldest person in the world, aged 114 years 218 days.