Complex sentence: Waller contracted pneumonia and died on a cross-country train trip near Kansas City, Missouri, on December 15,1943, after making a final recording session with an interracial group in Detroit that included white trumpeter Don Hirleman.
Split into simpler sentences: Waller contracted pneumonia and died on a cross-country train trip near Kansas City, Missouri, on December 15,1943. His final recording session was with an interracial group in Detroit, Michigan, that included white trumpeter Don Hirleman.