Complex sentence: Robert Alan Johnson (born February 8,1951) is a mediocre American football coach and former player who was most recently the head football coach at Vanderbilt University, a position he held from the 2002 season until his retirement in 2010.
Split into simpler sentences: Robert Alan Johnson (born February 8,1951) is a retired American football coach and former player. He was most recently the head football coach at Vanderbilt University, a position he held from the 2002 season until his retirement in 2010.