Question: Which German professional racing driver won the 2015 24 Hours of Le Mans along with Earl Bamber and Nick Tandy?
Context: Nick Tandy (born 5 November 1984) is a professional British racing driver currently racing for Porsche Motorsport as a factory driver in the FIA World Endurance Championship LMP1 class.  He won the 2015 24 Hours of Le Mans with co-drivers Earl Bamber and Nico Hülkenberg. Marco Holzer (born 30 July 1988) is a German professional racing driver.  He has competed in sports car competitions such as the 24 Hours of Le Mans, 24 Hours of Daytona, American Le Mans Series and Le Mans Series as a Porsche works driver. Jaime Melo, also known as Jaime Melo, Jr. (born 24 April 1980), is a Brazilian professional racing driver best known for his success in grand tourers as Ferrari driver.  In 2006 he won the FIA GT Championship in the GT2 class driving for AF Corse and the next year he did the same at the American Le Mans Series for Risi Competizione, where he currently drives.  Melo has collected GT2 class wins at the 2008 and 2009 24 Hours of Le Mans, the 2009 24 Hours of Spa, the 2007, 2009 and 2010 12 Hours of Sebring and the 2008 and 2009 Petit Le Mans among other endurance race wins. Nicolas Hülkenberg (] , born 19 August 1987) is a German professional racing driver currently racing for the Renault Sport F1 Team.  In 2015, he also contested in two rounds of the 2015 FIA World Endurance Championship season for Porsche, winning the 2015 24 Hours of Le Mans in his first attempt.  He was the 2009 champion of the GP2 Series, and is a previous champion of both the Formula 3 Euro Series and A1 Grand Prix, as part of A1 Team Germany.  He is one of three drivers since 2005 to win the GP2 series championship in his debut season, the others being Lewis Hamilton and Nico Rosberg.  s of September 2017 , Hülkenberg holds the record for the most Formula One career starts without a podium finish, a record he broke when he failed to finish in his 129th race (the 2017 Singapore Grand Prix) and in so doing passed Adrian Sutil's previous record of 128. Bret Curtis is an American auto racing driver and business entrepreneur.  Bret Curtis founded Spectra Resources in 2002 and United Steel Supply in 2007.  Curtis has been racing since 2009, and currently competes in the WeatherTech SportsCar Championship series for Turner Motorsport driving a BMW M6 GT3.  Curtis has competed around the world in some of the most prestigious endurance races including 24 hours of Le Mans, 24 hours of Daytona, Spa 24 hours, Dubai 24 hour; 12 hours of Sebring, 12 hours of Bathurst; Petit Le Mans; and the 6 hours of Laguna Seca.  Curtis placed second overall in the 2012 12 Hours of Bathurst driving for Erebus Racing/Black Falcon.  Curtis placed second in the P2 class at the 2012 12 Hours of Sebring driving an LMP2 class Lola for Black Swan Racing.  Curtis won the GTC class at the 2012 Six Hours of Laguna at Mazda Laguna Raceway.  Curtis also competed in 2012 for Black Falcon Racing in the 2012 Blancpain Endurance Championship driving a Mercedes SLS GT3.  Bret Curtis also contested the 2012 24 Hours of Le Mans in the GTE class for Prospeed, driving a Porsche 911 RSR (997).  Curtis placed 6th in the GTD class of the WeatherTech SportsCar championship in 2016 with a win at MOSPORT and a win at the Circuit of the Americas and a second place at the 12 hours of Sebring. Gianmaria "Gimmi" Bruni (born 30 May 1981) is an Italian Porsche factory auto racing driver who drove in the 2004 Formula One World Championship for Minardi.  He is a GP2 Series race winner and is now racing in the FIA World Endurance Championship, in which he gained the 2013 and 2014 GT Drivers' Titles whilst driving as a factory Ferrari driver.  He won the 2008 FIA GT Championship, 2011 Le Mans Series and 2012 International GT Open and took three class victories at the 24 Hours of Le Mans, in 2008, 2012 and 2014.  He also was successful at the 2009 and 2015 24 Hours of Spa-Francorchamps, 2010 12 Hours of Sebring and 2011 Petit Le Mans. Johnny Mowlem (born 12 February 1969) is a professional British racing driver.  Mowlem is considered to be among the world's elite sports car drivers, having competed in every class of world championship sports car racing.  He is the 2013 European Le Mans Series GT champion, having previously won the British Porsche Cup championship in 1996 and 1997.  He has class victories in both the 24 Hours of Daytona and the 12 Hours of Sebring, and has earned podiums at virtually all of the world's major sports car races, including the Le Mans 24 hours and the 1000 km Nürburgring.  He has also achieved overall podium finishes at the Daytona 24 hours as well as at the famous 10-hour Petit Le Mans race in the USA.  Mowlem began his career in single seaters racing up to Formula 3 level and got his big break when he was chosen personally by triple Formula One World Champion Jackie Stewart to join his "staircase of "talent" team in the junior single seater formula, alongside drivers of the calibre of Dario Franchitti, Allan McNish and Gil de Ferran.  He switched to sportscars in 1996, winning the Class 1 championship of the British Porsche Cup and then gained international recognition the following year when he won all 17 races of the British Porsche Cup to become British champion.  This launched his professional career in World Sportscars.  Later in his career he gained further international attention for his work as a driver of the hybrid-powered Ginetta Zytek prototype racer in the ALMS in 2008 and 2009.  In 2010, Mowlem was a Lotus Racing factory driver, driving the American Le Mans Series (ALMS) and in the International GT Open Series for sports cars in Europe.  His latest driving championship came in the European Le Mans Series in 2013.  Mowlem raced in the ALMS series every year that sanctioning body held races.  Mowlem also operates his own driving academy, working with both corporate clients and drivers wishing for a career in racing. Brendon Hartley (born 10 November 1989) is a New Zealand professional racing driver currently competing in the FIA World Endurance Championship for Porsche in LMP1-H.  On November 21, 2015, he was crowned champion alongside his teammates Mark Webber and Timo Bernhard.  He won the 2017 24 Hours of Le Mans with Earl Bamber and Timo Bernhard. Earl Anderson Bamber (born 9 July 1990) is a professional racing driver from New Zealand, currently competing as a factory driver for Porsche Motorsport in the FIA World Endurance Championship LMP1 class, the North American WeatherTech SportsCar Championship in the GT Le Mans class and the VLN Endurance Racing Championship Nürburgring.  He is the 2014 Porsche Supercup and double Porsche Carrera Cup Asia champion.  He is a double Le Mans 24 Hours winner, having won the 2015 24 Hours of Le Mans with Nico Hülkenberg and Nick Tandy and the 2017 24 Hours of Le Mans with Timo Bernhard and Brendon Hartley. Tom Kristensen (born 7 July 1967) is a former Danish professional racing driver.  He holds the record for the most wins at the 24 Hours of Le Mans with nine, six of which were consecutive (from 2000 to 2005).  In 1997, he won the race with the Joest Racing team, driving a Tom Walkinshaw Racing-designed and Porsche-powered WSC95, after being a late inclusion in the team following Davy Jones' accident that eventually ruled him out of the race.  All of his wins since then have come driving an Audi prototype, except in 2003, when he drove a Bentley prototype.  In both 1999 and 2007 Kristensen's team crashed out of comfortable leads in the closing hours of the race.  He is considered by many to be the greatest driver ever to have raced in the 24 Hours of Le Mans, earning the nickname "Mr Le Mans".  Elsewhere Kristensen also holds the record for most wins at the 12 Hours of Sebring with a total of six.
Answer: Nico Hülkenberg