Question: When was the  French racing driver who has  José Dolhem as a half brother born? 

full_context: Document 1: Patrick Pilet: Patrick Pilet (born October 8, 1981) is a French professional racing driver currently racing for Porsche Motorsport as a factory driver in the FIA World Endurance Championship and other racing series. He has competed in major sports car endurance races like the 24 Hours of Le Mans, 24 Hours of Daytona, 24 Hours of Spa, 12 Hours of Sebring and Petit Le Mans.
Document 2: Ligier JS25: The Ligier JS25 was a Formula One car designed by Michel Beaujon and Claude Galopin for use by the Ligier team during the 1985 Formula One season. Like its predecessor, the JS23, the JS25 was powered by a turbocharged Renault V6 engine although the car ran on Pirelli instead of Michelin tyres after the French company pulled out of Grand Prix racing at the end of . Drivers of the car were initially their driver Andrea de Cesaris and veteran Jacques Laffite who returned to the team after two fruitless years at Williams, but after a series of crashes, de Cesaris was fired by team boss Guy Ligier and replaced by Philippe Streiff.
Document 3: André Rossignol: André Rossignol was a French racing driver who became the first driver to win the 24 Hours of Le Mans twice, winning in consecutive years. Rossignol was a driver for the French Lorraine-Dietrich automobile company, and had been on their driving team since the inaugural Le Mans in 1923 . After having finished eighth and third the first two years, Rossignol and teammate Gérard de Courcelles won the event overall in 1925 . The following year, Robert Bloch was assigned to drive with Rossignol, and the race was won once again, with all three Lorraine-Dietrichs finishing on the podium.
Document 4: Jordi Gené: Jordi Gené Guerrero (born 5 December 1970) is a racing driver who competed in the World Touring Car Championship between 2005 and 2010. His younger brother, Marc is also a racing driver and is currently a test driver for the Scuderia Ferrari Formula One team.
Document 5: José Dolhem: Louis José Lucien Dolhem (26 April 1944 – 16 April 1988) was a racing driver from France, and the half brother of Formula One driver Didier Pironi (they had the same father and their mothers were sisters).
Document 6: Robert Dunlop: Stephen Robert Dunlop (25 November 1960 – 15 May 2008) was a Northern Irish motorcycle racer, the younger brother of fellow road racer, the late Joey Dunlop, and like Joey he died after a crash while racing.
Document 7: Clay Regazzoni: Gianclaudio Giuseppe Regazzoni (5 September 1939 – 15 December 2006), commonly called "Clay", was a Swiss racing driver. He competed in Formula One races from 1970 to 1980, winning five Grands Prix. His first win was the Italian Grand Prix at Monza in his debut season, driving for Ferrari. He remained with the Italian team until . After a single season with BRM, Regazzoni returned to Ferrari for a further three years, to . After finally leaving Ferrari at the end of 1976, Regazzoni joined the Ensign and Shadow teams, before moving to Williams in , where he took the British team's first ever Grand Prix victory, the 1979 British Grand Prix at Silverstone.
Document 8: Michele Alboreto: Michele Alboreto (23 December 1956 – 25 April 2001) was an Italian racing driver. He was runner up to Alain Prost in the 1985 Formula One World Championship, as well as winning the 1997 24 Hours of Le Mans and 2001 12 Hours of Sebring sports car races. Alboreto competed in Formula One from until , racing for a number of teams, including five seasons (1984–88) for Ferrari.
Document 9: Philippe Alliot: Philippe Alliot (born 27 July 1954 in Voves, Eure-et-Loir, France) is a former racing driver who participated in Formula One from to and from to . He raced for RAM, Ligier, Larrousse and McLaren.
Document 10: Jean-Pierre Frey: Jean-Pierre Frey (born January 6, 1955) is a former Swiss racing driver from Baselgia, Medel (Lucmagn). He competed in full seasons of the FIA Formula 3000 Championship in 1986 and 1987 but failed to qualify for a single race in a time when the series was incredibly competitive. Frey went to the United States to race in two CART Championship Car races in 1988 for Dick Simon Racing and two more for Euromotorsport in 1989. He entered the 1989 Indianapolis 500 but his entry was declined due to a lack of experience. His best CART finish was 13th place in his debut at Laguna Seca Raceway. Frey also participated in sports car racing, including the World Sports Car Championship, the 1985 and 1988 24 Hours of Le Mans, and the 1989 24 Hours of Daytona where he drove a Zakspeed prepared Ford Probe GT-Prototype with teammates Marty Roth and Albert Naon, Jr.
Document 11: Jean-Louis Schlesser: Jean-Louis Schlesser (born 12 September 1948) is a French racing driver with experience in circuit racing and cross-country rallying. He is known for his wins of many different competitions. He is the nephew of Jo Schlesser, a former Formula One driver.
Document 12: Didier Pironi: Didier Joseph Louis Pironi (26 March 1952 – 23 August 1987) was a French racing driver. During his career he competed in 72 Formula One World Championship Grands Prix, driving for Tyrrell (1978–1979), Ligier (1980) and Ferrari (1981–1982). He won the 24 Hours of Le Mans in 1978 driving a Renault Alpine A442B.
Document 13: Pierre Gasly: Pierre Gasly (born 7 February 1996 in Rouen) is a French formula racing driver, who was the 2014 Formula Renault 3.5 Series runner-up and the 2016 GP2 Series champion. He drives a Honda-powered car for Team Mugen in the 2017 Super Formula Championship. He will make his Formula One début at the 2017 Malaysian Grand Prix.
Document 14: 1982 Dutch Grand Prix: The 1982 Dutch Grand Prix was a Formula One motor race held at Zandvoort on 3 July 1982. The race, contested over 72 laps, was the ninth race of the 1982 Formula One season and was won by Didier Pironi, driving a Ferrari, with Nelson Piquet second in a Brabham-BMW and Keke Rosberg third in a Williams-Ford.
Document 15: Pedro Rodríguez (racing driver): Pedro Rodríguez de la Vega (18 January 1940 – 11 July 1971) was a Mexican Grand Prix motor racing driver. He was the older brother of Ricardo Rodríguez.
ground_truth: 26 March 1952