Complex sentence: Bradford High School was named after Mary D. Bradford, who was Superintendent of Schools for the Kenosha school system from 1878 to 1894, and again from 1910 to 1921.
Split into simpler sentences: Bradford High School was named after Mary D. Bradford, Superintendent of Schools for the Kenosha school system starting 1910. She served as Superintendent of Schools of Kenosha from 1878 to 1894, and again from 1910 to 1921.