Question: What chemical compound did the first woman to win a nobel prize use to separate radium from barium?
Sentence (from "Marie Curie"): Marie Skłodowska Curie ( ; ] ; ] ; 7 November 18674 July 1934; born Maria Salomea Skłodowska; ] ) was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity.
Relevant evidence: Yes