Complex sentence: Cardinal Gizzi was a "papabile" and was the champion of the progressive party of the church and public opinion, he's believed that he received some preferences during the first ballot but Cardinal Mastai Ferretti was elected.
Split into simpler sentences: Cardinal Gizzi was a "papabile" and was the champion of the progressive party of the church and public opinion. He is believed to have received some preferences during the first ballot, but Cardinal Mastai Ferretti was elected.