Complex sentence: In the 1990--91 season, Bagnoli took Genoa to fourth place in the final league standings in his first year in charge; it was the team's best finishing position in the top Italian division for more than 50 years.
Split into simpler sentences: In the 1990--91 season, Bagnoli took Genoa to fourth in the standings in his first year in charge. It was the team's best finishing position for more than 50 years.