An example is Elizabeth Blackwell, who became the first certified female doctor in the US when she graduated from Geneva Medical College in 1849. With her sister, Emily Blackwell, and Marie Zakrzewska, Blackwell founded the New York Infirmary for Women and Children in 1857 and the first women's medical college in 1868, providing both training and clinical experience for women doctors. _She_ also published several books on medical education for women. <sep>, Pronoun: She <sep>, A: Marie Zakrzewska <sep>, B: Blackwell