Complex sentence: The champions of both the NCAA and NIT tournaments played each other for a few years during World War II. From 1943 to 1945, the American Red Cross sponsored a postseason charity game between each year's tourment champions to raise money for the war effort.
Split into simpler sentences: The champions of both the NCAA and NIT tournaments played from 1943 to 1945. During World War II, the American Red Cross sponsored a postseason charity game between each year's tourment champions to raise money for the war effort.