Question: What did the Prema Powerteam win with the 2014 Formula Renault 3.5 Series runner-up?

Context paragraphs:
Matthieu Vaxivière: Matthieu Vaxivière is a French racing driver.  He was born on 3 December 1994 in Limoges, France.  He was the 2011 French F4 champion.  In 2012 he raced in the V de V Endurance Cup, French GT, and 2e Grand Prix Èlectrique.  In addition, he was 14th in the 2012 Formula Renault 2.0 Alps season and 29th in the Formula Renault 2.0 Eurocup, driving for Tech 1 Racing.  In 2013 he finished 10th in the Formula Renault 2.0 Eurocup and 18th in the Formula Renault 2.0 Alps.  In 2014 he was assigned as one of the drivers for the Lotus F1 Junior team, while competing in the Formula Renault 3.5 series alongside Filipino-Swiss driver Marlon Stöckinger.

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.

List of Formula Renault 3.5 Series drivers: This is a List of Formula Renault 3.5 Series drivers, that is, a list of drivers who have made at least one entry in the Formula Renault 3.5 Series.  This list does not count drivers who have only appeared in the previous World Series by Nissan and current World Series Formula V8 3.5.  This list is accurate up to the end of the ninth and final round of the 2015 season.

Colin Fleming (racing driver): Colin Fleming (born April 21, 1984 in San Diego, California) is an American former racing driver who completed in the Formula Renault 2.0 Eurocup, Formula Renault 2000 Germany and Formula Renault 3.5 in 2005 and 2006 with Jenzer Motorsport and Carlin Motorsport, he was also a member from the Red Bull Junior Team, Fleming finished 4th in the Formula Renault 2.0 Eurocup in 2004 and was rookie of the year in the Formula Renault 2000 Germany also in that year.  He also raced against fellow American and Californian and future Formula One Driver Scott Speed.  In 2005 he switched to the Formula Renault 3.5 with Swiss team Jenzer Motorsport, despite three DNS in the first 3 and missing one race of that season he finished 13th with 34 points with a best finish of 3rd in the second race in the Bugatti Circuit, to 2006 he switched to Carlin where he finished 6th in the first race of the season in Zolder, however he failed to qualify to the Second Race of the weekend and he finished 4th in Circuit de Monaco and 8th in both races in Istanbul Park, after this round he asked to leave Carlin and the Red Bull Junior Team, Red Bull officially released him and he was replaced by fellow Red Bull Junior Team member and Future Formula One Champion Sebastian Vettel, after leaving Red Bull, he returned to the United States to complete in the Atlantic Championship mid-season and he finished 20th with 45 points and since then has not raced anymore in a Major Series, until he decided to retire.  Now Colin is a high-level executive with Salesforce.

2015 Formula Renault 3.5 Series: The 2015 Formula Renault 3.5 Series season is a multi-event motor racing championship for open wheel, formula racing cars held across Europe.  The championship features drivers competing in Formula Renault 3.5 formula race cars that conform to the technical regulations for the championship.  The 2015 season is the eleventh and final Formula Renault 3.5 Series season organised by Renault Sport, after it was announced that the organisation would withdraw its backing of the championship at the end of the season.

Roberto Merhi: Roberto Merhi Muntan (born 22 March 1991) is a Spanish racing driver who, in 2015, drove in Formula One for the Manor Marussia F1 Team as well as the Formula Renault 3.5 Series for Pons Racing.  Merhi is also a part of the revitalized Mercedes-Benz Junior Team, together with Christian Vietoris and Robert Wickens.  In 2011, Merhi won the Formula 3 Euro Series championship, while driving for Prema Powerteam.

2005 Formula Renault 3.5 Series: The 2005 Formula Renault 3.5 Series was the first Formula Renault 3.5 Series season.  The season began on 1 May at Zolder, Belgium and finished at Monza, Italy on 23 October after 17 races.  Robert Kubica was crowned series champion.

2013 Formula Renault 3.5 Series: The 2013 Formula Renault 3.5 Series season was a multi-event motor racing championship for open wheel, formula racing cars held across Europe.  The championship features drivers competing in 3.5 litre Formula Renault single seat race cars that conform to the technical regulations for the championship.  The 2013 season was the ninth Formula Renault 3.5 Series season organized by the Renault Sport.  The season began at Autodromo Nazionale Monza on 6 April and finished on 20 October at Circuit de Barcelona-Catalunya.  The series formed part of the World Series by Renault meetings at seven double header events with double header event at Monza and single event at Monaco.

Prema Powerteam: Prema Powerteam (competing as Prema Racing in the FIA Formula 2 Championship) is a motorsport team from Italy.  It mainly operates in the FIA Formula 3 European Championship as well as various junior championships.  The team was founded in 1984.  Also this team was a part of Toyota Driver Programme.  Currently the team has strong ties with Mercedes and Ferrari, running many of the current Ferrari Driver Academy drivers.  Its most recent success is winning the GP2 Drivers' title with Pierre Gasly and Teams' championship.

2014 Formula Renault 3.5 Series: The 2014 Formula Renault 3.5 Series season was a multi-event motor racing championship for open wheel, formula racing cars held across Europe.  The championship featured drivers competing in 3.5 litre Formula Renault single seat race cars that conformed to the technical regulations for the championship.  The 2014 season was the tenth Formula Renault 3.5 Series season organized by Renault Sport.  The season began at Autodromo Nazionale Monza on 12 April and finished on 19 October at Circuito de Jerez.  The series formed part of the World Series by Renault meetings at seven double header events, with additional events held at Monza (double header) and a single race in support of the Monaco Grand Prix .

Supporting paragraphs: Prema Powerteam Pierre Gasly
Answer: GP2 Drivers'