Complex sentence: Young Firpo (April 25,1907-August 21,1984) was a professional lightheavyweight boxer who was a popular boxer in the Pacific Northwest during the 1920s and 1930s, particularly in Portland, Oregon.
Split into simpler sentences: Young Firpo (April 25,1907-August 21,1984) was a professional light-heavyweight boxer. He was a popular fighter in the Pacific Northwest during the 1920s and 1930s, particularly in Portland, Oregon.