Q204 refers to a specific identifier used in the context of the Wikidata knowledge base. It is a unique code that helps categorize and link various entities, such as people, places, and concepts, within the database. Each Q-number corresponds to a distinct item, making it easier for users to find and reference information. In the Wikidata system, Q204 is associated with a particular subject, which can include historical figures, scientific concepts, or geographical locations. This structured approach allows for efficient data retrieval and enhances the interconnectedness of information across the platform.