Task: Question Answering
Input (English): Passage: The Packers played at Lambeau Field for the second time in five days, a Thursday night game versus their divisional rivals, the Minnesota Vikings. The game was played on the third anniversary of the passing of Irv Favre, Brett Favre's father. In the first quarter, the Packers entered the red zone on each of their drives, but only scored once on a 38-yard field goal from kicker Dave Rayner. Rayner would miss his next two field goals. The Packers defence forced the Vikings to punt on all their possessions in the first half. The Packers scored on the final play of the half with a 44-yard field goal from Dave Rayner. In the third quarter cornerback Charles Woodson intercepted Vikings quarterback Tarvaris Jackson, marking his seventh interception of the season extending a career-high. Later in the third quarter, Brett Favre was intercepted by cornerback Fred Smoot. Smoot returned the interception into the end zone, gaining the first lead of the game for the Vikings. In the fourth quarter the Packers drove the ball into Vikings territory, but tight end Bubba Franks fumbled the ball at the two-yard line, turning possession over to the Vikings. The Packers drove the ball 41&#160;yards on their next possession to set Dave Rayner in position to attempt a field goal. Rayner made a 44-yard field goal with 1:34 left in the game to give the packers a 9-7 lead. The Vikings were unable to score on their last possession which granted the Packers their seventh win of the season. Despite scoring only nine points, the Packers recorded 19 first downs and 319 total yards. Brett Favre completed 26 of 50 passes, gaining 285&#160;yards. Favre also recorded two interceptions. Defensively, the Packers limited the Vikings to three total first downs and a 2-14 first down rate. The Vikings punted ten times in the game. Packers defensive end, Aaron Kampman had three sacks in the game. The game marked only the third time in NFL history when the losing team scored the only touchdown off a defensive turnover, the first coming from another 9-7 result at Lambeau Field between the Packers and Vikings with the Vikings beating the Packers in that contest. 
Question: How many years prior did Brett Favre's father pass away on the date of the game? 
Answer type: Number 
Output (English): 3.