Complex sentence: She was one of 4 daughters and one son, David, born to the Rev. David Railton, the son of George Scott Railton, who was second in command of William and Catherine Booth's Salvation Army.
Split into simpler sentences: She was one of 4 daughters and one son, David, born to the Rev. David Railton. Her father, Rev. Railton, was the son of George Scott Railton, who was second in command of William and Catherine Booth's Salvation Army.