Question: In which year did this Austrian former Formula One driver who finished third at the 1978 Brazilian Grand Prix win the F1 World Drivers' Champion first?

Context paragraphs:
1976 Brazilian Grand Prix: The 1976 Brazilian Grand Prix was a Formula One motor race held at Interlagos in São Paulo, Brazil on 25 January 1976.  It was the opening round of the 1976 Formula One season.  The race was the fifth Brazilian Grand Prix and the fourth to be held for the World Drivers' Championship.  The race was held over 40 laps of the 7.87-kilometre circuit for a total race distance of 315 kilometres.

List of Formula One polesitters: Formula One, abbreviated to F1, is the highest class of open-wheeled auto racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body.  The "formula" in the name refers to a set of rules to which all participants and cars must conform.  The F1 World Championship season consists of a series of races, known as Grands Prix, held usually on purpose-built circuits, and in a few cases on closed city streets.  The polesitter is the driver that has qualified for a Grand Prix in pole position, at the front of the starting grid.  Drivers are awarded points based on their position at the end of each race, and the driver who accumulates the most points over each calendar year is crowned that year's World Champion.  Out of 970 completed Grands Prix (as of the 2017 Singapore Grand Prix), the driver that has qualified on pole position has gone on to win the race 407 times.

List of Formula One drivers: Formula One, abbreviated to F1, is the highest class of open-wheeled auto racing defined by the Fédération Internationale de l'Automobile (FIA), motorsport's world governing body.  The "formula" in the name refers to a set of rules to which all participants and cars must conform.  The F1 world championship season consists of a series of races, known as Grands Prix, held usually on purpose-built circuits, and in a few cases on closed city streets.  Drivers are awarded points based on their position in each race, and the driver who accumulates the most points over each calendar year is crowned that year's World Champion.  As of the 2017 Singapore Grand Prix, there have been 970 FIA World Championship races since its first event, the 1950 British Grand Prix.

2012 European Grand Prix: The 2012 European Grand Prix (formally, the 2012 Formula 1 Grand Prix of Europe) was a Formula One motor race that was held at the Valencia Street Circuit in Valencia, Spain on 24 June 2012.  It was the eighth round of the 2012 championship season, and the final time the circuit hosted the European Grand Prix.  It was Fernando Alonso's second Grand Prix win in Spain after the 2006 Spanish Grand Prix held at Barcelona.  Michael Schumacher finished third at the age of 43 years and 173 days, the oldest to climb to the podium since Jack Brabham's second-place finish at the 1970 British Grand Prix.  It was Schumacher's best result since his comeback in 2010 and the final podium finish of his Formula One career.

Alan Jones (racing driver): Alan Stanley Jones, {'1': ", '2': ", '3': ", '4': "} (born 2 November 1946 in Melbourne, Victoria) is an Australian former Formula One driver.  He was the first driver to win a Formula One World Championship with the Williams team, becoming the 1980 World Drivers' Champion and the second Australian to do so following triple World Champion Sir Jack Brabham.  He competed in a total of 117 Grands Prix, winning 12 and achieving 24 podium finishes.  In 1978 Jones won the Can-Am championship driving a Lola.

Niki Lauda: Andreas Nikolaus "Niki" Lauda (born 22 February 1949) is an Austrian former Formula One driver and a three-time F1 World Drivers' Champion, winning in 1975, 1977 and 1984.  He is currently the only driver to have been champion for both Ferrari and McLaren, the sport's two most successful constructors.  More recently an aviation entrepreneur, he has founded and run two airlines (Lauda Air and Niki).  He is also Bombardier Business Aircraft brand ambassador.  He was also a consultant for Scuderia Ferrari and team manager of the Jaguar Formula One racing team for two years.  He is currently working as a pundit for German TV during Grand Prix weekends and acts as non-executive chairman of the Mercedes AMG Petronas F1 Team.  Lauda owns 10% of the team.

1979 Formula One season: The 1979 Formula One season was the 33rd season of FIA Formula One motor racing.  It featured the 1979 World Championship of F1 Drivers and the 1979 International Cup for F1 Constructors which were contested concurrently over a fifteen-round series which commenced on 21 January 1979, and ended on 7 October.  The season also included three non-championship Formula One races.  Jody Scheckter of Scuderia Ferrari won the 1979 World Championship of F1 Drivers while Scuderia Ferrari won 1979 International Cup for F1 Constructors.  Gilles Villeneuve made it a 1–2 for Ferrari in the championship, concluding a successful second half of the 1970s for Ferrari (three drivers' and four constructors' titles).  Alan Jones finished the season strongly for Williams, finishing third in the championship and with teammate Clay Regazzoni scoring Williams' first ever Grand Prix win as a constructor.  Scheckter's title was Ferrari's last drivers' title for 21 years, before Michael Schumacher won five consecutive titles for the team between 2000 and 2004.

1980 Brazilian Grand Prix: The 1980 Brazilian Grand Prix was a Formula One motor race held on 27 January 1980 at the Interlagos circuit in the Interlagos neighborhood of São Paulo.  It was the second round of the 1980 Formula One season, and it was also the ninth Brazilian Grand Prix.  It was the eighth to be held at Interlagos and would be the last until the circuit was substantially redeveloped for the 1990 Brazilian Grand Prix.  The race was held over 40 laps of the 7.87-kilometre circuit for a total race distance of 315 kilometres.  This race was originally supposed to be held at the Jacarepaguá circuit in Rio de Janeiro, but was transferred to Interlagos because parts of the Rio circuit's tarmac were actually sinking into the soft swampland the circuit was built on.  This last-minute switch to Interlagos- which was to be resurfaced and heavily rebuilt with new pit facilities and safety measures for the 1981 season caused a lot of controversy- Interlagos had returned a bit too soon for some of the drivers.

1978 Brazilian Grand Prix: The 1978 Brazilian Grand Prix was a Formula One motor race held on 29 January 1978 at Jacarepagua.  The race was won by Argentine driver Carlos Reutemann driving a Ferrari 312T2 in a flag-to-flag performance.  The win also represented the first win for tyre manufacturer Michelin.  Local driver Emerson Fittipaldi was second, scoring the first podium finish for the Fittipaldi Automotive with Austrian Brabham driver Niki Lauda finishing third.  French driver Didier Pironi took his first points in Formula One, finishing sixth.  The race also represented the first win for French tyre manufacturer Michelin in Formula One.

1975 Brazilian Grand Prix: The 1975 Brazilian Grand Prix was a Formula One motor race held at Interlagos on 26 January 1975.  It was race 2 of 14 in both the 1975 World Championship of Drivers and the 1975 International Cup for Formula One Manufacturers.  It was the fourth Brazilian Grand Prix since its introduction in 1972.  The race was won by São Paulo native Carlos Pace driving a Brabham BT44B.  It was the only win of Pace's career; he was killed in an aircraft accident two years later.  The circuit now holds his name.  It would be eight years before another Brazilian would win the Grand Prix.  Fellow Brazilian Emerson Fittipaldi finished second in his McLaren M23 with his German team mate Jochen Mass finishing third.

Supporting paragraphs: 1978 Brazilian Grand Prix Niki Lauda
Answer: 1975