Read this article and answer this question Born Millicent Vernon Hammond, she was the middle of three children born to renowned politician and later United States Ambassador to Spain, Ogden H. Hammond (October 13, 1869 - October 29, 1956) of Louisville, Kentucky and his first wife, Mary Picton Stevens (May 16, 1885  - May 7, 1915) of Hoboken, New Jersey. Her paternal grandparents were General John Henry Hammond (June 30, 1833 - April 30, 1890),  who served as chief of staff for William Tecumseh Sherman during the Vicksburg Campaign, and Sophia Vernon Wolfe (1842 - May 20, 1923), daughter of Nathaniel Wolfe, a lawyer and legislator from Louisville. Her maternal grandparents were John Stevens (July 1856 - January 21, 1895), oldest son of Stevens Institute of Technology founder Edwin Augustus Stevens and grandson of inventor John Stevens (inventor, born 1749), and Mary Marshall McGuire (May 4, 1850 - May 2, 1905).
How many older siblings did Millicent Vernon Hammond have?
1