Complex sentence: At the Hospital, he kept the X-ray machines going until Singapore fell a few days later and was then interred in Changi, then Sime Road camps, along with the senior medical staff of the hospital.
Split into simpler sentences: At the Hospital, he kept the X-ray machines going until Singapore fell a few days later. He was then interred in Changi, then Sime Road camps, along with the senior medical staff of the hospital.