Dear Mr. or Ms., I thank you for your efforts. We have generated a database in RDF format including data that have been retrived from social networks (messages, users...). We would like to build a website having the same structure as Wikidata in which we can put our big data and query it using SPARQL. I ask about how Wikidata is built and works: Where data are saved... I also ask if we can use the system of Wikidata database (codes, system files, technical details..) so that we can gain time when working on our interface. Yours Sincerely, Houcemeddine Turki