( N B W ) Who is Sadie Tanner Mossell Alexander?

Sadie Tanner Mossell Alexander (1898 – 1989) achieved a lot of firsts in her life.
She was the first African American woman to receive a Ph.D. in the United States, the first woman to receive a law degree from the University of Pennsylvania Law School, the first African American woman to be admitted to the Pennsylvania Bar, and the first national president of Delta Sigma Theta Sorority.