Complex sentence: On October 27,1857 Coolidge married Eunice Maria Weeks, they had four children, William Williamson Coolidge, Louise Coolidge, Alice Coolidge, and Charles Cummings Coolidge.
Split into simpler sentences: On October 27,1857 Coolidge married Eunice Maria Weeks. They had four children, William Williamson Coolidge, Louise Coolidge, Alice Coolidge, and Charles Cummings Coolidge.