Wikipedia has not only revolutionized reference, but it also provides content that fuels many successful web applications. Wikipedia is just the flagship of the Wikimedia foundation, which has many other useful projects. One of these is Wikidata, which originated as a way to synchronize structured data used in more than one Wikipedia page. Wikidata has quickly grown into an ambitious initiative to gather all sorts of knowledge as structured data. Explore Wikidata through its web API in preparation for using its rich, public domain resources in your own work.