Task: Question Answering
Input (English): Passage: Coming off their sweeping win over the Bucs, the Saints flew to Heinz Field for a match-up with the defending Super Bowl champion Pittsburgh Steelers.  In the first quarter, the Saints trailed early as quarterback Ben Roethlisberger completed a 37-yard touchdown pass to WR Hines Ward and a 2-yard touchdown pass to TE Heath Miller.  Afterwards, New Orleans got on the board with quarterback Drew Brees completing a 3-yard touchdown pass to WR Terrance Copper.  In the second quarter, the Saints started to take command as kicker John Carney completed a 20-yard field goal, while rookie RB Reggie Bush got a 15-yard touchdown run on a reverse.  Pittsburgh would get kicker Jeff Reed to get a 32-yard field goal, yet New Orleans responded with RB Deuce McAllister getting a 4-yard touchdown run.  In the third quarter, the Steelers started to fight back as Roethlisberger completed a 38-yard touchdown pass to WR Cedrick Wilson for the only score of the period.  In the fourth quarter, RB Willie Parker followed up two 70+ yard runs with a 3-yard and a 4-yard touchdown run to give Pittsburgh the lead.  The Saints tried to fight back with McAllister getting a 4-yard touchdown run, but Pittsburgh held on to win.  With the loss, the Saints fell to 6-3. 
Question: how many yards did bush get? 
Answer type: Number 
Output (English): 15.