Who was the president of the United Mine Workers union who led several significant labor strikes in the early 20th-century?

John L. Lewis

Who portrays the magical nanny Mary Poppins in the 1964 film? What is the rope-arrow-bow setup used in archery called? What Christmas carol originally written in Latin can be translated as "Come, all ye faithful"? What war was fought between North and South Korea from 1950 to 1953? Which African city was once the capital of the Songhai Empire?