Complex sentence: Stevens worked to be able to become a full researcher at Bryn Mawr, however, before she could take the research professorship offered to her, she died on May 4,1912, of breast cancer at Johns Hopkins Hospital.
Split into simpler sentences: Stevens worked to be able to become a full researcher at Bryn Mawr. However, before she could take the research professorship offered to her, she died May 4,1912, of breast cancer at Johns Hopkins Hospital.