Dear all, I thank you for your efforts. I have to thank Dr. Andra Waagmeester, Dr. Finn Årup Nielsen and Dr. Egon Willighagen for their comments concerning the points I raised in Wikidata. These comments were useful to learn about ShEx project. I saw several papers about the project at http://labra.weso.es/ and I was honoured to see how it can provide schemas for Wikidata classes that can be later used to validate Wikidata. I ask if someone is interested in creating shape expressions of Medical Wikidata classes. As well, I tried to access http://wikidata-shex.wmflabs.org/w/index.php. However, it does not work. I ask about how to use Wikidata ShEx. I also ask if a tool can be developed to turn a Wikidata statement in red if it does not correspond to the shape expressions of the class of its subject. Yours Sincerely, Houcemeddine Turki (he/him) Medical Student, Faculty of Medicine of Sfax, University of Sfax, Tunisia Undergraduate Researcher, UR12SP36 GLAM and Education Coordinator, Wikimedia TN User Group Member, WikiResearch Tunisia Member, Wiki Project Med Member, WikiIndaba Steering Committee Member, Wikimedia and Library User Group Steering Committee Co-Founder, WikiLingua Maghreb Founder, TunSci ____________________ +21629499418