Question: What German rally and auto racing driver, born on March 7, 1947 was beaten at the World Rally Championship while attempting to defend his title as World Champion?

full_context: Document 1: 1997 British Touring Car Championship: The 1997 Auto Trader RAC British Touring Car Championship was won by Alain Menu of the Williams Renault Dealer Racing team, driving a Renault Laguna. Menu dominated the year, setting a record of 12 wins during the season. The runner up was Frank Biela of Audi Sport UK in an Audi A4 Quattro. Third place was Menu's teammate, Jason Plato. In the independent class the championship was won by Robb Gravett in a Honda Accord.
Document 2: 1996 British Touring Car Championship: The 1996 Auto Trader RAC British Touring Car Championship season marked the arrival of Audi to the sport with their four wheel drive A4s. The title was won by Frank Biela, with Swiss driver Alain Menu again finishing in second place and Swede Rickard Rydell in third.
Document 3: 1983 FIA Formula One World Championship: The 1983 FIA Formula One World Championship was the 37th season of FIA Formula One motor racing. It featured the 1983 FIA Formula One World Championship, which commenced on 13 March and ended on 15 October after fifteen races. Nelson Piquet won the World Drivers' Championship, his second Formula One title and the first to be won by a driver using a turbocharged engine. The Manufacturers' Championship was won by Ferrari.
Document 4: 2018 FIA World Rally Championship: The 2018 FIA World Rally Championship will be the forty-fifth season of the World Rally Championship, an auto racing championship recognised by the Fédération Internationale de l'Automobile (FIA) as the highest class of international rallying. Teams and crews will compete in fourteen events for the World Rally Championships for Drivers, Co-drivers and Manufacturers. Crews are free to compete in cars complying with World Rally Car and Group R regulations; however, only Manufacturers competing with 2017-specification World Rally Cars are eligible to score points in the Manufacturers' championship. The series will once again be supported by the WRC-2 and WRC-3 championships and the WRC Trophy at every round, and by the Junior World Rally Championship at selected rounds.
Document 5: Walter Röhrl: Walter Röhrl (born 7 March 1947) is a German rally and auto racing driver, with victories for Fiat, Opel, Lancia and Audi as well as Porsche, Ford and BMW.
Document 6: Formula One drivers from Germany: There have been 52 Formula One drivers from Germany including three world champions, one of whom is currently racing in the sport. Michael Schumacher holds many records in F1 including the most world championship titles and the most consecutive titles. In 2008 Sebastian Vettel became the youngest ever driver to win a race (which was later broken) and, in 2010, became the youngest world championship winner. In 2016, Nico Rosberg became the third driver from Germany to win the F1 drivers' championship. There are currently three German race drivers in Formula One.
Document 7: 2016 World Rally Championship: The 2016 World Rally Championship was the forty-fourth season of the World Rally Championship, an auto racing championship recognised by the Fédération Internationale de l'Automobile (FIA) as the highest class of international rallying. Teams and drivers competed in thirteen rounds—starting with the Rallye Monte Carlo in January and finishing with Rally Australia in November—for the World Rally Championships for Drivers and Manufacturers.
Document 8: Stig Blomqvist: Stig Lennart Blomqvist (born 29 July 1946) is a Swedish rally driver. He made his international breakthrough in 1971. Driving an Audi Quattro for the Audi factory team, Blomqvist won the World Rally Championship drivers' title in 1984 and finished runner-up in 1985. He won his home event, the Swedish Rally, seven times.
Document 9: 1995 World Rally Championship: The 1995 World Rally Championship was the 23rd season of the Fédération Internationale de l'Automobile (FIA) World Rally Championship (WRC). The season consisted of 8 rallies. The drivers' world championship was won by Colin McRae in a Subaru Impreza 555, ahead of team-mate Carlos Sainz. The manufacturers' title was won by Subaru.
Document 10: Wolf WR7: The Wolf WR7 was a Formula One car built for the 1979 season by the Walter Wolf Racing team. Three examples of the car were produced. The first was WR7. A second car, WR8, was built to the same specification, while a slightly modified car, WR9, first appeared at the British Grand Prix. The cars were driven by 1976 champion James Hunt and Keke Rosberg. The engine was a Ford Cosworth DFV.
Document 11: 1983 World Rally Championship: The 1983 World Rally Championship was the 11th season of the Fédération Internationale de l'Automobile (FIA) World Rally Championship (WRC). The season consisted of 12 rallies. By this time, the schedule format had become generally stable, with only one or two changes to venues year to year. 1983 brought the return of Argentina to the schedule in place of Brazil. Audi's Hannu Mikkola beat the defending world champion Walter Röhrl and his Lancia teammate Markku Alén to the drivers' title. Lancia captured the manufacturers' title from Audi by just two points.
Document 12: Wolf WR1: The Wolf WR1 was a Formula One car built for the 1977 season by the Walter Wolf Racing team. Four examples of the car were produced. The first, completed well before the start of the season, was the WR1. Another two identical cars were built: WR2, finished ahead of the first race; and WR3, ready in March 1977. At the end of the season, a fourth car, WR4, was produced with slight adjustments, and WR1 was remodeled in similar fashion for . The original car was driven exclusively by South African future 1979 World Champion Jody Scheckter in 1977. WR3 and WR4 were also driven by fellow future World Champion Keke Rosberg in the 1978 season.
Document 13: 2017 World Rally Championship: The 2017 FIA World Rally Championship is the forty-fourth season of the World Rally Championship, an auto racing championship recognised by the Fédération Internationale de l'Automobile (FIA) as the highest class of international rallying. Teams and crews are competing in thirteen events—starting in Monte Carlo on 19 January and ending in Australia on 19 November—for the World Rally Championships for Drivers, Co-drivers and Manufacturers. Drivers are free to compete in cars complying with World Rally Car and Group R regulations; however, only Manufacturers competing with 2017-specification World Rally Cars are eligible to score points in the Manufacturers' championship. The series is once again supported by the WRC-2 and WRC-3 championships and the newly created WRC Trophy at every round, and by the Junior World Rally Championship at selected rounds.
Document 14: Audi R10 TDI: The Audi R10 TDI, usually abbreviated to R10, is a racing car from the German car manufacturer Audi. The car is a classic at Le Mans, winning every year since its introduction until it was replaced by the R15. It is designed and constructed for sports car racing in the Le Mans Prototype LMP1 class of the 24 Hours of Le Mans, and other similar endurance races. The car was unveiled 13 December 2005 at 12:00 CET, and went on to win both its maiden race at the 2006 12 Hours of Sebring in March, and the June 2006 24 Hours of Le Mans.
Document 15: 1973 Swedish Rally: The 1973 Swedish Rally (formally the 24th International Swedish Rally) was the second round of the inaugural World Rally Championship season. Run in mid-February around Karlstad, Sweden, the rally was the only snow and ice rally of the WRC calendar, a distinction it would keep as it remained a fixture of the WRC through the years. Only in 2007 would it finally be joined on the schedule by a second snow rally in Norway.
ground_truth: Walter Röhrl