Complex sentence: The first 10 aircraft were to be delivered before February 1940, consequently a group of Finnish pilots arrived in Rome for a training course of 10 hours at Guidonia airport and later at Fiat Aviazione in Turin.
Split into simpler sentences: The first 10 aircraft were to be delivered before February 1940. A group of Finnish pilots attended a 10-hour training course at Guidonia airport and later at Fiat Aviazione in Turin.