What is the fine-grained topic of the following text: Laurent Fabius, Najat Belkacem-Vallaud, Marylise Lebranchu, Stéphane Le Foll and Aurélie Filippetti all have expanded roles - while Christiane Taubira, Marisol Touraine and Jean-Yves Le Drian remain in the posts they held under former Prime Minister Jean-Marc Ayrault. Only return the topic.
Changes in roles of French politicians under a new Prime Minister.