Question: The 1990–91 U.C. Sampdoria season ended with which striker as the leading scorer?

full_context: Document 1: Francesco Totti: Francesco Totti, , (] ; born 27 September 1976) is an Italian former professional footballer who played for Roma and the Italy national team. He played primarily as an attacking midfielder or second striker, but could also play as a lone striker or winger. He currently serves as a club director with Roma.
Document 2: 1989–90 Serie A: 1989–90 of the Serie A was another dominant year for Napoli, with Diego Maradona being among the leading goalscorers in Serie A (16 goals), behind Marco van Basten of Milan (19 goals) and Roberto Baggio of Fiorentina (17 goals). But while Baggio's Fiorentina narrowly avoided relegation, Maradona's Napoli won their second Serie A title in four seasons, while Van Basten helped Milan retain the European Cup as compensation for their failure to win the Serie A title, having finished two points behind Napoli. Demoted to Serie B for 1990–91 were Udinese, Verona, Cremonese and Ascoli.
Document 3: Luca Toni: Luca Toni, (] ; born 26 May 1977) is an Italian former professional footballer who played as a striker. He also was a sporting director (director of football) for Verona.
Document 4: Fabio Cannavaro: Fabio Cannavaro, (] ; born 13 September 1973) is an Italian former professional footballer and current manager of Chinese club Tianjin Quanjian.
Document 5: 1991–92 U.C. Sampdoria season: U.C. Sampdoria came nowhere to defending its inaugural Serie A title from 1990-91, but was extremely close to an ever bigger honour, only losing out on extra time to Barcelona in the European Cup final. The end result was 1-0 to the Spaniards, thanks to Ronald Koeman's free kick.
Document 6: 1984–85 U.C. Sampdoria season: U.C. Sampdoria recorded its best league season since 1960-61, thanks to a fourth place-finish. President Mantovani had surprised the football world by signing Liverpool stalwart Graeme Souness to the squad, and it paid off, with Souness adapting quickly to Italian football, also helping the team to win the 1985 edition of Coppa Italia, which was the first ever title for the club. The defensive line, with Moreno Mannini, Pietro Vierchowod and Antonio Paganin among the crew, was the main reason for the success, Sampdoria conceding just 23 goals in 30 league matches played. Quite a few of the players were still with the club when it finally won the league title in 1991.
Document 7: 1992–93 U.C. Sampdoria season: U.C. Sampdoria continued its decline and finished in seventh position in Serie A, once again missing out on international competitions. New coach Sven-Göran Eriksson came to a squad that had lost its main striker Gianluca Vialli, but despite his absence Sampdoria scored 50 goals in 34 matches, but the defence leaked in an uncharacteristic manner for Eriksson's teams.
Document 8: 2004–05 U.C. Sampdoria season: U.C. Sampdoria enjoyed its best season since 1993–94, when the club finished third in Serie A and won Coppa Italia. In 2004-05 Sampdoria was able to finish fifth in the standings, thanks to a robust defence and a goalscoring ace in secondary striker Francesco Flachi, who played the football of his life. With only 29 goals conceded, the defence of Sampdoria was fully comparable with those of top sides Juventus and Milan, and coach Walter Novellino was hailed for the strong performance in the clubs' second season since its return to Serie A.
Document 9: 1986–87 U.C. Sampdoria season: U.C. Sampdoria started its march towards an eventual Serie A championship and European Cup final with its appointment of Yugoslav coach Vujadin Boškov. With Britons Graeme Souness and Trevor Francis leaving the squad, Boškov built his team around young Italian players, with Roberto Mancini, Gianluca Vialli, Pietro Vierchowod and Moreno Mannini among the bulwark of the squad as Sampdoria finished 6th in a tight battle involving several teams for 3rd in the championship.
Document 10: Gianluca Vialli: Gianluca Vialli (born 9 July 1964) is an Italian football manager and former footballer who played as a striker. Since retiring, he has gone into management and punditry and is a commentator for Sky Sport Italia.
Document 11: Vincenzo Montella: Vincenzo Montella (] ; born 18 June 1974) is an Italian former footballer who is currently the manager of Milan.
Document 12: 1990–91 U.C. Sampdoria season: U.C. Sampdoria won their first ever Serie A title, thanks to a remarkable season for a team playing on its absolute peak. Gianluca Vialli was the league top scorer on 19 goals, and Roberto Mancini, Attilio Lombardo, goalkeeper Gianluca Pagliuca plus centre half Pietro Vierchowod were also instrumental in Sampdoria's success story.
Document 13: 1987–88 U.C. Sampdoria season: U.C. Sampdoria won its second cup trophy in just three years, defeating Torino in the final, thanks to a 3-2 aggregate victory. Gianluca Vialli scored ten goals to become club top scorer, as Sampdoria finished fourth in the domestic league.
Document 14: Italo Galbiati: Italo Galbiati (born 8 August 1937 in Italy) is an Italian football coach and former player. He is a trusted assistant to Fabio Capello having worked with Capello at AC Milan, Roma, Juventus, Real Madrid and England national team. He has also managed AC Milan himself on a caretaker basis, and is currently an assistant manager to Capello with the Russia national team.
Document 15: Pietro Paolo Virdis: Antonio Pietro Paolo Virdis (born 26 June 1957) is an Italian football manager and former player, who played as a forward. Throughout his career, he played for Nuorese, before playing in Serie A with Cagliari Calcio, Juventus F.C., Udinese Calcio, and A.C. Milan; he ended his career with Lecce. Known for his eye for goal, with Juventus, he won two league titles and a Coppa Italia; with Milan, he was the league's top-scorer in 1987, also winning a league title and the Supercoppa Italiana in 1988, and was part of the club's European Cup victory in 1989. At international level, he represented the Italy under-23 side at the 1988 Summer Olympics, helping the team to a fourth-place finish.
ground_truth: Gianluca Vialli