Question: How many Grand Prix did the racing driver born in Castel d'Ario win ?
Context: Raymond William Reed (30 April 1932 – 8 May 1970) was a Rhodesian racing driver born in Gwelo, Southern Rhodesia.  He was entered in the 1965 South African Grand Prix in his self-built RE-Alfa Romeo, but did not take part and had earlier participated in the non-championship 1964 Rand Grand Prix.  Reed was killed along with his three children in an aircraft accident on 8 May 1970 near Nottingham Road, Natal in South Africa.  He had been deemed to be flying in weather conditions under which he was not qualified or legally permitted to fly. John Malcolm Taylor (23 March 1933 – 8 September 1966) was a racing driver from England.  He participated in five World Championship Formula One Grands Prix, and also participated in several non-championship Formula One races.  His Formula One debut was on 11 July 1964, at the British Grand Prix at Brands Hatch driving a one-litre, 4-cylinder, Cooper–Ford T73, where he finished fourteenth, 24 laps down, after an extended pit–stop due to a gearbox problem.  Taylor did not compete in the Formula One World Championship in 1965, but continued to drive in non–championship races.  He returned to Grand Prix racing in 1966 driving a two-litre Brabham–BRM for privateer David Bridges.  His first race that season was the French Grand Prix at Reims where he scored his one championship point.  There followed eighth places at both the British Grand Prix at Brands Hatch and the Dutch Grand Prix at Zandvoort. Tazio Giorgio Nuvolari (] ; 16 November 1892 – 11 August 1953) was an Italian racing driver.  First he raced motorcycles and then he concentrated on sports cars and single-seaters.  Resident in Mantua, he was known as 'Il Mantovano Volante' (The Flying Mantuan) and nicknamed 'Nivola'.  His victories—72 major races, 150 in all —included 24 Grands Prix, five Coppa Cianos, two Mille Miglias, two Targa Florios, two RAC Tourist Trophies, a Le Mans 24-hour race, and a European Championship in Grand Prix racing.  Ferdinand Porsche called him "the greatest driver of the past, the present, and the future." The Klenk-Meteor was a racing car which competed in the 1954 German Grand Prix.  The car was based on the established German marque of Veritas which was active between 1948 and 1953.  Veritas is chiefly remembered as a manufacturer of sports cars and successful Formula Two racing cars.  The company closed when its founder, Ernst Loof, became ill.  He subsequently died in 1956.  The Klenk-Meteor entered for the 1954 German Grand Prix was essentially a Veritas Formula Two car.  The car was owned and prepared by the noted German racing driver Hans Klenk who intended to race it himself in the Grand Prix.  However, Klenk's career as a racing driver came to an end when he suffered injuries in an accident while working as a test driver for Mercedes-Benz.  The car was driven in the Grand Prix by another German, Theo Helfrich.  He retired on lap 9 with engine failure. Max Emilian Verstappen (] ; born 30 September 1997) is a Belgian-Dutch racing driver who competes under the Dutch flag in Formula One with Red Bull Racing.  Aged , he became the youngest driver to compete in Formula 1 at the 2015 Australian Grand Prix for Scuderia Toro Rosso.  He is also the youngest driver to lead a lap during a Formula One Grand Prix, youngest driver to set the fastest lap during a Formula One Grand Prix, youngest driver to score points, youngest driver to secure a podium and youngest Formula One Grand Prix winner in history. Christian Roger Xavier Marie Joseph Ghislain Goethals (4 August 1928 in Heule – 26 February 2003 in Kortrijk) was a racing driver from Belgium.  Goethals competed as an amateur in sports car races, driving a Porsche Spyder during the 1950s.  His best results were a second-place finish with his brother in the 1956 1500cc class event in Reims, and a win in the same class the following year at Forez.  Goethals acquired a Cooper-Climax and entered it in the Formula Two class of the 1958 German Grand Prix, but retired from the race.  He did not participate in another Formula One Grand Prix, and returned to sports cars, with notable finishes in 1960 of fifth in the Buenos Aires 1000 km and second in the GP de Spa.  He retired from racing later in the season.  He established a racing team called "Écurie Éperon d'Or" to participate in the 1958 German Grand Prix where he raced in a Cooper T43. August "Bubi" Momberger (26 June 1905 – 22 December 1969) was a German racing driver and engineer, who competed in Grand Prix motor racing events for various manufacturers between 1926 and 1934.  During the 1934 Grand Prix season – the first season of the infamous Silver Arrows period of German dominance of Grand Prix racing, that would last until the outbreak of WWII – he drove for the "Auto Union Rennabteilung", and was the first driver of a Silver Arrows car to take a podium finish in a major race.  During the season he took a further second-placed finish, and posted two fastest laps, but worsening arthritis and a deteriorating relationship with the Auto Union team manager forced him into retirement before the end of the year.  Following his retirement from racing, Momberger returned to his engineering training and rose steadily through the ranks of the German automobile industry, eventually becoming technical director of the Borgward company's Goliath division in Bremen. Álex Palou Montalbo (born 1 April 1997) is a Spanish racing driver born in Sant Antoni de Vilajamajor, Spain.  As of 2015, he drives for Campos Racing in the GP3 Series.  He became the first Spanish racing driver to win a GP3 race when he took the victory of the final round of his debut season, held at the Yas Marina Circuit of Abu Dhabi. Castel d'Ario is a "comune" (municipality) in the Province of Mantua in the Italian region Lombardy, located about 150 km east of Milan and about 15 km east of Mantua.  It was the birthplace of car race driver Tazio Nuvolari. José Froilán González (October 5, 1922 – June 15, 2013) was an Argentine racing driver, particularly notable for scoring Ferrari's first win in a Formula One World Championship race at the 1951 British Grand Prix.  He made his Formula One debut for Scuderia Achille Varzi in the 1950 Monaco Grand Prix.  His last Grand Prix was the 1960 Argentine Grand Prix.
Answer: 24