Question: Who is the paternal grandfather of Giovanni Paolo I Sforza?
Sentence (from "Giovanni Paolo I Sforza"): When his other half-brother Francesco II made a similar attempt (1525), Giovanni Paolo was besieged in the Castello Sforzesco by the Spaniards under Antonio de Leyva; three years later he was again besieged by them in Lodi, this time with victorious results.
Relevant evidence: No