Complex sentence: Giovanni Mari took over as club president in 1979 and under him, Legnano would achieve the championship of Serie C2, this was the first time A.C. Legnano had finished first position in any league since 1919.
Split into simpler sentences: Giovanni Mari took over as club president in 1979 and under him, Legnano would achieve the championship of Serie C2. This was the first time A.C. Legnano had finished first position in any league since 1919.