Complex sentence: Her paternal grandparents were Muzio Attendolo Sforza, a renowned "condottiero", and Lucia di Torsano, and her maternal grandparents were Filippo Maria Visconti, Duke of Milan and Agnese del Maino, daughter of Ambrogio del Maino, a Milanese nobleman and ducal questore.
Split into simpler sentences: Her paternal grandparents were Muzio Attendolo Sforza, a renowned "condottiero", and Lucia di Torsano. Her maternal grandparents were Filippo Maria Visconti, Duke of Milan and Agnese del Maino, daughter of Ambrogio del Maino, a Milanese nobleman and ducal questore.