Wikidata is an incredible source of data. The project is powered by open access principles; any human or machine can read and edit its knowledge base. This means that sites as large as Wikipedia or as small as your personal homepage can rely on this global repository of information.
A quick query in the search bar at wikidata.org will provide a sense of the knowledge base. But the tool’s true power is exposed through its open SPARQL endpoint. A person can write a query like Who are the descendants of Johann Sebastian Bach? or What notable people died on August 8, 2001? and immediately receive an answer from the Wikidata Query Service.
Most entities on Wikidata are assigned a instance-of property. Atari and https://www.atari.com/ are two different ways of referring to the same video game company. We can say that Atari is an instance of a video game company.
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