Complex sentence: The aircraft on display was built in 1939 and was operated by the Swiss Air Force for a long time before being moved to an Italian flying school in 1963; it was donated to the Caproni Museum by a private owner in 1976 and was restored in 1989.
Split into simpler sentences: The aircraft on display was built in 1939 and was operated by the Swiss Air Force for a long period before being moved to an Italian flying school in 1963. It was donated to the Caproni Museum by a private owner in 1976 and was restored in 1989.