Complex sentence: Charles Henry Noll (born January 5,1932) is a former professional American football player and coach and now works in the steelers front office as Administration Advisor, most notably the head coach of the Pittsburgh Steelers of the National Football League from 1969 to 1991.
Split into simpler sentences: Charles Henry Noll (born January 5,1932) is a former professional American football player and coach and now works in the Pittsburgh Steelers front office as Administration Advisor. He served most notably as the head coach of the Pittsburgh Steelers of the National Football League from 1969 to 1991.