Complex sentence: Edward Grady Partin, Sr. (February 27,1924--March 11,1990), was a business agent of the Teamsters Union in Baton Rouge, Louisiana, whose testimony in 1964 helped to convict union president James Riddle Hoffa of jury tampering.
Split into simpler sentences: Edward Grady Partin, Sr. (February 27,1924--March 11,1990), was a business agent of the Teamsters Union in Baton Rouge, Louisiana. His testimony in 1964 helped to convict union president James Riddle Hoffa of jury tampering.