The Bengals took a 10-0 lead in the first quarter thanks to a Mike Nugent 34-yard field goal and a 14-yard touchdown pass from Andy Dalton to Jerome Simpson. The Seahawks tallied 411 total yards, mostly through the air, behind backup quarterback Tarvaris Jackson, but were kept out of the end zone until midway through the fourth quarter.  After a 48-yard field goal by Mike Nugent with 4:50 left in the game gave the Bengals a 20-12 lead, the Bengals sealed the victory with a Brandon Tate 56-yard punt return for a touchdown, and a Reggie Nelson 75-yard interception return for a touchdown.
Question: How many yards of differential exhist between the first field goal and the first touchdown scored?
Answer: 20