Complex sentence: The civil rights movement in North Omaha goes back to at least 1912, when the National Association for the Advancement of Colored People Omaha chapter was founded, and in 1928, when the first Urban League chapter in the western United States was started in North Omaha.
Split into simpler sentences: The civil rights movement in North Omaha goes back to at least 1912, when a local chapter was founded of the National Association for the Advancement of Colored People (NAACP). In 1928 the first Urban League chapter in the western United States was started in North Omaha.