What is the fine-grained topic of the following text: Val-de-Marne lies to the south-east of Paris, and is, together with Seine-Saint-Denis and Hauts-de-Seine, one of three small d�partements in the Ile-de-France region that form a ring around Paris, known as the petite couronne. Only return the topic.
Val-de-Marne's location and relationship to Paris