Parisien

The provided news articles do not mention an organization called "Parisien." Therefore, it's impossible to provide a summary about its background, newsworthiness, recent events, or relevance based on the given information. The articles cover unrelated topics within France: the political ambitions of Boris Vallaud within the Socialist party, the investigation into the murder of Quentin Deranque in Lyon involving individuals associated with far-right groups, and speculation surrounding a potential return to the stage for singer Céline Dion in Paris. These articles highlight current events in French politics, crime, and entertainment, respectively, but offer no insight into any organization called "Parisien."