 Complete the following phrase:  Born at Mantua, Boninsegna started his career in Serie B the second tier of Italian professional football with Prato in 196364 season. He transferred to Potenza, who was Serie B team in 196465 season. He also played for Varese in 196566 and Cagliari between 19661969, helping the club to a second-place finish during the 196869 Serie A season alongside Luigi Riva. During the summer of 1967, Cagliari came to the United States to play in the North American Soccer League as the Chicago Mustangs; Boninsegna led the club in scoring with 11 goals in nine matches. Boninsegna gained a status as an efficient striker with Internazionale Milano F.C. and the Italian national football team in the 1970s, playing alongside Sandro Mazzola. In Serie A, he totaled 171 goals in 281 games, and was top goalscorer in Italy during the 197071 and 