Question: Kyriakos Tamvakis is a Greek theoretical physicist and professor who has held positions at what European research organization that operates the largest particle physics laboratory in the world?
Sentence (from "CERN"): The European Organization for Nuclear Research (French: "Organisation européenne pour la recherche nucléaire"), known as CERN ( ; ] ; derived from the name "Conseil Européen pour la Recherche Nucléaire"), is a European research organization that operates the largest particle physics laboratory in the world.
Relevant evidence: Yes