Wikidata
Wikidata is a free and open knowledge base that can be read and edited by both humans and machines. Acting as central storage for the structured data of Wikimedia sister projects including Wikipedia, Wikivoyage, Wiktionary, Wikisource, and others, it contains over 119 million data items that anyone can edit. Wikidata provides structured, machine-readable data under a free license (CC0), supports multilingual content, and can be interlinked with other open data sets on the linked data web. The content is available through standard formats, SPARQL queries, and APIs.
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