the period from 1920 until 1935 certainly must have been one with much unhappiness for anna wheeler since during those years her father, mother, two husbands and close friend and colleague emmy noether died. anna wheeler remained at bryn mawr until her retirement in 1948.

How would the previous sentence be correctly capitalized?
The period from 1920 until 1935 certainly must have been one with much unhappiness for Anna Wheeler since during those years her father, mother, two husbands and close friend and colleague Emmy Noether died. Anna Wheeler remained at Bryn Mawr until her retirement in 1948.