Question: In what year did CO Les Ulis alumni Anthony Martial earn the Golden Boy Award?

Context paragraphs:
Bilel Mohsni: Bilel Mohsni (born 21 July 1987) is a French-born Tunisian professional footballer who plays as a defender for Etoile Sportive du Sahel and the Tunisian national team.  Mohsni has previously played for CO Les Ulis, Mende, US Saint-Georges, Sainte-Geneviève Sports, Southend United, Ipswich Town, Rangers and Paris FC.

Lucas Ocampos: Lucas Ariel Ocampos (born 11 July 1994) is an Argentine professional footballer who plays as a winger Ligue 1 club Marseille.  Ocampos began his senior career in Argentina with River Plate before joining Monaco for a Ligue 2 record fee of €11 million in 2012.  He spent two-and-a-half seasons in the principality and was nominated for the European Golden Boy award before joining Marseille in 2015.

CO Les Ulis: Le Club Omnisports des Ulis is a French association football club founded in 1977.  They are based in Les Ulis, Essonne and are currently playing in the Championnat National 3, the fifth tier of the French football league system.  They play at the Stade Salinier, named after Jean-Marc Salinier, a local politician from the area, in Les Ulis.  CO Les Ulis is primarily known for being the club where France national team members Patrice Evra and all-time leading goalscorer Thierry Henry began their careers.  The club has also developed emerging youth prospects, such as Anthony Martial, Yaya Sanogo and Sega Keita.

Anthony Martial: Anthony Joran Martial (] ; born 5 December 1995) is a French professional footballer who plays as a forward for English club Manchester United and the France national team.  He was the recipient of the 2015 Golden Boy Award for the best under-21 player in Europe.

Les Ulis: Les Ulis (] ) is a commune in the Essonne department located in the southwestern suburbs (banlieue) of Paris, France.  It is 23 km from the centre of Paris.

Edscha: Edscha Cabrio-Dachsysteme is an oem manufacturer of automobile convertible roof systems.  The company is headquartered in Hengersberg, in Lower-Bavaria in Germany.  Other locations include Pontiac near Detroit in the USA; Niagara Falls in Canada; Toluca in Mexico; Coventry in England; Les Ulis near Paris in France; Cantabria in Spain; Velky Meder in Slovakia; Regensburg in Germany; Shanghai in China; Yokohama in Japan and Togliatti in Russia.

Gilbert Bayiha N'Djema: Gilbert Bayiha-N'Djema (born August 9,1979 in Les Ulis, France) is a Cameroonian former footballer.  He is currently the head coach of CS Longueuil's reserve team.

Route nationale 118: Route nationale 118 is now a French route nationale from Sèvres to Les Ulis.

Noui Laïfa: Noui Laïfa (born 23 December 1986 in Les Ulis) is a French football player.  He plays as a defensive midfielder often playing in a withdrawn position as a deep-lying playmaker.  Laïfa joined Créteil from amateur rivals and Championnat de France amateur club UJA Alfortville and signed a one-year contract with a club option for a second year.

Canton of Les Ulis: The canton of Les Ulis is an administrative division of the Essonne department, Île-de-France region, northern France.  Its borders were modified at the French canton reorganisation which came into effect in March 2015.  Its seat is in Les Ulis.

Supporting paragraphs: CO Les Ulis Anthony Martial
Answer: 2015