Complex sentence: Her two children, Edward Howland Robinson Green "Ned" and Hetty Sylvia Ann Howland Green "Sylvia", were born there, Ned on August 22,1868 and Sylvia on January 7,1871.
Split into simpler sentences: Her two children, Edward Howland Robinson Green "Ned" and Sylvia, were born there. Ned was born on August 22,1868 and Sylvia Green (1871-1951) (formally, Hetty Sylvia Ann Howland Green) on January 7,1871.