Claim: Marie Curie was a French citizen.
Evidence: Marie Skłodowska Curie -LRB- -LSB- ˈkjʊri , _ kjʊˈriː -RSB- -LSB- kyʁi -RSB- ; -LSB- kʲiˈri -RSB- ; 7 November 18674 July 1934 -RRB- , born Maria Salomea Skłodowska -LRB- -LSB- ˈmarja salɔˈmɛa skwɔˈdɔfska -RSB- -RRB- , was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity.
Naturalization -LRB- or naturalisation -RRB- is the legal act or process by which a non-citizen in a country may acquire citizenship or nationality of that country.