Question: Which game has been nominated for a prize at Cannes, Concept or Roulette? 

Context articles: Text roulette
Roulette (film)
L'Œil d'or
Roulette
Rapid Roulette
Rosyjska Ruletka
Russian roulette
Concept (board game)
Table game
Timbuktu (2014 film)

Text roulette or SMS roulette is a game played chiefly by schoolchildren, in which they compose a text message on their mobile phone then send it to one of their contacts or a made-up number at random.
Roulette is a 2013 American independent thriller–drama film written and directed by Erik Kristopher Myers.
 The story centers on three characters (Mike Baldwin, Ali Lukowski, and Will Haza) troubled by their pasts and gambling with their lives through a game of Russian roulette, only to find that their lives are connected through overlapping events that have consequently brought them together.
L'Œil d'or, le prix du documentaire — Cannes (] , "The Golden Eye, The Documentary Prize — Cannes") is a documentary film award created in 2015.
 It is awarded to the best documentary presented in one of the sections of the Cannes Film Festival (Official Selection, Directors' Fortnight, International Critics' Week and Cannes Classics).
 Initiated by the Civil Society of Multimedia Authors (SCAM - Société Civile des Auteurs Multimédia) and its President Julie Bertuccelli, the prize is awarded in partnership with the Institut national de l'audiovisuel and with the support of Cannes Film Festival and its General Delegate Thierry Frémaux.
Roulette is a casino game named after the French word meaning "little wheel".
 In the game, players may choose to place bets on either a single number or a range of numbers, the colors red or black, or whether the number is odd or even, or if the numbers are high (19–36) or low (1–18).
Rapid Roulette is an Irish television quiz show.
 Four contestants compete to answer quick-fire general knowledge questions to win cash and prizes.
 The title refers to the show's roulette wheel that contestants spin throughout the course of the game to determine their cash and/or prizes.
Rosyjska Ruletka (English translation: "Russian Roulette") was a Polish game show based on the original American format of "Russian Roulette".
 The show was hosted by Krzysztof Ibisz (earlier by actor Henryk Talar).
 The main goal of the game was to win 100,000 zlotys. "Rosyjska Ruletka" was broadcast from 2002 to 2004.
 It was shown on the Polish TV station Polsat.
 Only one person won 100,000 zlotys.
Russian roulette (Russian: Русская рулетка , "Russkaya ruletka") is a lethal game of chance in which a player places a single round in a revolver, spins the cylinder, places the muzzle against their head, and pulls the trigger.
 "Russian" refers to the supposed country of origin, and roulette to the element of risk-taking and the spinning of the revolver's cylinder, which is reminiscent of a spinning roulette wheel.
Concept is a 2014 board game developed by Alain Rivollet and Gaëtan Beaujannot and published by Repos.
 It was nominated for the Jeu de l'année prize in Cannes in 2014.
In casinos, the term table game is used to distinguish games such as blackjack, craps, roulette and baccarat that are played on a table and operated by one or more live dealers like a croupier or poker dealer, from games played on a mechanical device like a video slot machine.
 The term has significance in that some jurisdictions permit casinos to have only slots and no table games.
 In some states, this law has made casinos host electronic table games, such as roulette, blackjack, and craps.
Timbuktu is a 2014 French-Mauritanian drama film directed by Abderrahmane Sissako.
 It was selected to compete for the Palme d'Or in the main competition section at the 2014 Cannes Film Festival.
 At Cannes, it won the Prize of the Ecumenical Jury and the François Chalais Prize.
 It was nominated for the Academy Award for Best Foreign Language Film at the 87th Academy Awards, and has been nominated for the BAFTA Award for Best Film Not in the English Language at the 69th British Academy Film Awards.
 It won Best Film at the 11th Africa Movie Academy Awards.
 The film was named the twelfth "Best Film of the 21st Century So Far" in 2017 by The New York Times.