Complex sentence: The black and white Freedom riders were trying to compel the U.S. government to enforce U.S. Supreme Court decisions outlawing segregated transportation, and wanted to end the discriminatory practice of allocating seating on the buses and bus stations with a preference for whites.
Split into simpler sentences: The black and white Freedom riders were trying to compel the U.S. government to enforce U.S. Supreme Court decisions outlawing segregated transportation. They wanted to end the discriminatory practice of allocating seating on the buses and bus stations with a preference for whites.