Task: Question Generation
Input (English): Passage: The Eagles faced off with the Baltimore Ravens in an interconference matchup.  Both defenses dominated the first quarter, and in the second quarter, Baltimore forced three turnovers (two interceptions and a fumble) from Donovan McNabb.  Ravens kicker Matt Stover booted a 44-yard field goal, while quarterback Joe Flacco completed a 1-yard touchdown pass to tight end Daniel Wilcox.  However, rookie  Quintin Demps returned the following kickoff 100 yards for a Philadelphia touchdown to make it 10-7 Ravens at halftime.  Andy Reid decided to bench McNabb (who was 8-for-18 for 59 yards and two interceptions) and put backup quarterback Kevin Kolb into the game.  Kolb also struggled with the Baltimore defense, and the Eagles fell behind 12-7 when linebacker Jameel McClain blocked Sav Rocca's punt into the back of the endzone for a safety. In the fourth, the Ravens kicked another field goal after a Kolb interception, then Mark Clayton took a short slant 53-yards for a touchdown to make it 22-7.  Kolb drove Philadelphia to the Raven 1-yard line, but was intercepted in the end zone by Ed Reed, who returned the ball an NFL-record 108 yards for the touchdown.  Le'Ron McClain added a 1-yard touchdown run as Baltimore won 36-7.  Kolb was 10-for-23 for 73 yards and two interceptions, and Brian Westbrook had 39 yards rushing on 14 carries.  The Eagles dropped to 5-5-1.
Output (English): How many safeties were scored?