Complex sentence: Terrible Terry McGovern (March 9,1880--February 22,1918), born John Terrence McGovern in Johnstown, Pennsylvania, was a hard punching aggressive boxer who held the world bantamweight and featherweight titles.
Split into simpler sentences: Terrible Terry McGovern (March 9,1880--February 22,1918) was born John Terrence McGovern in Johnstown, Pennsylvania. He was a hard punching aggressive boxer who held the world bantamweight and featherweight titles.