What is the fine-grained topic of the following text: Agnes finds it difficult to draw answers out of anyone-the tight-lipped Swiss family living in the château, the servants who have been loyal to the family for generations, the aging World War II survivor who lives in the neighboring mansion, even the American history student studying at the Vallotton château's library. Only return the topic.
Agnes struggling to gather information from various individuals around the Vallotton château.