Question: The Lotus team driver who finished second in the 1963 German Grand Prix won how many World Championships?

Context paragraphs:
1974 German Grand Prix: The 1974 German Grand Prix was a Formula One motor race held at the Nürburgring on 4 August 1974.  It was race 11 of 15 in both the 1974 World Championship of Drivers and the 1974 International Cup for Formula One Manufacturers.  It was the 36th German Grand Prix and the 33rd to be held at the Nürburgring complex of circuits.  The race was won by Swiss driver Clay Regazzoni driving a Ferrari 312B3.  Regazzoni led every lap on the way to his second Grand Prix victory, some four years after his debut victory at the 1970 Italian Grand Prix.  South African driver Jody Scheckter was second driving a Tyrrell 007 ahead of Argentine driver Carlos Reutemann (Brabham BT44).

1963 German Grand Prix: The 1963 German Grand Prix was a Formula One motor race held at Nürburgring on August 4, 1963.  It was race 6 of 10 in both the 1963 World Championship of Drivers and the 1963 International Cup for Formula One Manufacturers.  The 15-lap race was won by Ferrari driver John Surtees after he started from second position.  Jim Clark finished second for the Lotus team and BRM driver Richie Ginther came in third.

2013 German Grand Prix: The 2013 German Grand Prix (formally known as the Formula 1 Großer Preis Santander von Deutschland 2013) was a Formula One motor race that was held on 7 July 2013 at the Nürburgring in Nürburg, Germany.  The race was the ninth round of the 2013 season, and marked the 74th running of the German Grand Prix overall, and the 60th running of the German Grand Prix since 1950, when the racing series now known as the Formula One World Championship was created.  This is the earliest a German Grand Prix has been held in a calendar year, followed by the 1926 and the 2009 editions of the race.

1968 United States Grand Prix: The 1968 United States Grand Prix was a Formula One motor race held on October 6, 1968, at the Watkins Glen Grand Prix Race Course in Watkins Glen, New York.  It was race 11 of 12 in both the 1968 World Championship of Drivers and the 1968 International Cup for Formula One Manufacturers.  The 108-lap race was won by Matra driver Jackie Stewart after he started from second position.  Graham Hill finished second for the Lotus team and Honda driver John Surtees came in third.  This was the debut race of the future world champion Mario Andretti.

2013 Indian Grand Prix: The 2013 Indian Grand Prix (formally the 2013 Formula 1 Airtel Indian Grand Prix) was a Formula One motor race held on 27 October 2013 at the Buddh International Circuit, Greater Noida, Uttar Pradesh, India.  It was the sixteenth round of the 2013 Formula One season, and the third Indian Grand Prix.  The race, contested over 60 laps, was won by Sebastian Vettel, driving a Red Bull, from a pole position start.  Nico Rosberg finished second in a Mercedes, with Romain Grosjean third for the Lotus team.  Vettel's win confirmed him as 2013 Drivers' Champion, as Fernando Alonso could not pass Vettel's points total with only three races remaining.  Red Bull also clinched their fourth consecutive Constructors' Championship.

1969 South African Grand Prix: The 1969 South African Grand Prix, formally the Third AA Grand Prix of South Africa (Afrikaans: "Derde AA Suid-Afrikaanse Grand Prix"), was a Formula One motor race held at Kyalami Circuit on 1 March 1969.  It was race 1 of 11 in both the 1969 World Championship of Drivers and the 1969 International Cup for Formula One Manufacturers.  The 80-lap race was won by Matra driver Jackie Stewart after he started from fourth position.  Graham Hill finished second for the Lotus team and McLaren driver Denny Hulme came in third.

Jim Clark: James Clark, Jr OBE (4 March 1936 – 7 April 1968), known as Jim Clark, was a British Formula One racing driver from Scotland, who won two World Championships, in 1963 and 1965.

1969 Dutch Grand Prix: The 1969 Dutch Grand Prix was a Formula One motor race held at the Zandvoort Circuit on June 21, 1969.  It was race 4 of 11 in both the 1969 World Championship of Drivers and the 1969 International Cup for Formula One Manufacturers.  The 90-lap race was won by Matra driver Jackie Stewart after he started from second position.  Jo Siffert finished second for the Lotus team and Ferrari driver Chris Amon came in third.

Klenk: 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.

1972 South African Grand Prix: The 1972 South African Grand Prix, formally the Sixth AA Grand Prix of South Africa (Afrikaans: "Sesde AA Suid-Afrikaanse Grand Prix"), was a Formula One motor race held at Kyalami on 4 March 1972.  It was race 2 of 12 in both the 1972 World Championship of Drivers and the 1972 International Cup for Formula One Manufacturers.  The 79-lap race was won by McLaren driver Denny Hulme after he started from fifth position.  Emerson Fittipaldi finished second for the Lotus team and McLaren driver Peter Revson came in third.

Supporting paragraphs: 1963 German Grand Prix Jim Clark
Answer: two