Question: Who won 23 World Rally Championships, two in particular with the Lancia Delta Group A rally car?
Context: The Lancia ECV (standing for "Experimental Composite Vehicle") was a prototype Group S rally car developed by the Italian manufacturer Lancia to replace the Lancia Delta S4 in World Rally Championship competition for the 1988 season.  However, Group B as well as Group S cars were banned from competition by the FIA in late 1986 due to safety concerns and the ECV never raced.  Lancia instead developed the Group A Lancia Delta. The Lancia Delta Group A is a Group A rally car built for the Martini Lancia by Lancia to compete in the World Rally Championship.  It is based upon the Lancia Delta road car and replaced the Lancia Delta S4.  The car was introduced for the 1987 World Rally Championship season and dominated the World Rally Championship, scoring 46 WRC victories overall and winning the constructors' championship a record six times in a row from 1987 to 1992, in addition to drivers' championship titles for Juha Kankkunen (1987 and 1991) and Miki Biasion (1988 and 1989), making Lancia the most successful marque in the history of the WRC and the Delta the most successful car. The Lancia Delta S4 is a Group B rally car from the Italian car company Lancia.  The Delta S4 competed in the World Rally Championship in 1985 and 1986, until Group B class was disbanded and the cars were eventually banned from competition completely by European sanctioning body FIA.  The car replaced, and was an evolution of, the Lancia 037.  The S4 took full advantage of the Group B regulations, and featured a midship-mounted engine and all-wheel drive for superior traction on loose surfaces. The Lancia Rally ("Tipo 151", also known as the Lancia Rally 037, Lancia 037 or Lancia-Abarth #037 from its Abarth project code "037") was a mid-engine sports car and rally car built by Lancia in the early 1980s to compete in the FIA Group B World Rally Championship.  Driven by Markku Alén, Attilio Bettega, and Walter Röhrl, the car won Lancia the manufacturers' world championship in the 1983 season.  It was the last rear-wheel drive car to win the WRC. The Ford Fiesta RS WRC is the World Rally Car built for the Ford World Rally Team by Ford Europe and M-Sport for use in the 2011 World Rally Championship season.  It is based upon the Ford Fiesta road car, and replaced the Ford Focus RS WRC, which competed in various versions since 1999.  It is also built to the new World Rally Car regulations for 2011, which are based upon the existing Super 2000 regulations, but is powered by a turbocharged 1.6-litre engine (1.6 L turbo Ford EcoBoost engine) rather than the normally aspirated 2-litre engine found in Super 2000 cars.  M-Sport and Ford introduced a Super 2000 version of the Ford Fiesta at the beginning of 2010, which forms the base of the WRC car. 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. The Lancia Stratos HF  ("Tipo 829"), widely and more simply known as Lancia Stratos, is a sports car and rally car made by Italian car manufacturer Lancia.  The HF stands for "High Fidelity".  It was a very successful rally car, winning the World Rally Championship in 1974, 1975 and 1976. 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. Juha Matti Pellervo Kankkunen (   ) (born 2 April 1959 in Laukaa) is a Finnish former rally driver.  His factory team career in the World Rally Championship lasted from 1983 to 2002.  He won 23 world rallies and four drivers' world championship titles, which were both once records in the series.  Sébastien Loeb has since collected more world titles, but no driver has so far been able to repeat Kankkunen's feat of becoming a world champion with three different manufacturers. Super 1600, also known as S1600, is a rally car formula that is primarily used in the Junior World Rally Championship, as well as various national rally championships.  Any automobile manufacturer that has a suitable road-going production model in its range may develop a specification for use in this formula.  It was devised by the Fédération Internationale de l'Automobile (the international governing body of motorsport) in 2000 and first saw competitive use in 2001.  Super 1600 is intended to provide a young driver's entry point into international rallying, and the World Rally Championship in particular.
Answer: Juha Kankkunen