Complex sentence: He earned a medical degree from the University of Perugia specializing in tropical medicine on 12 October 1940, two days after Italy entered World War II, when he was called up as a medic and sent to Libya in March 1943.
Split into simpler sentences: He earned a medical degree from the University of Perugia specializing in tropical medicine. On 12 October 1940, two days after Italy entered World War II, Burri was called up as a medic and sent to Libya in March 1943.