Answer based on context:

After their bye week, the Lions traveled to Chicago, Illinois for a rematch with their division foes the Chicago Bears. Chicago started the scoring with a 6-yard touchdown rush by Matt Forte. The Bears added to their lead with a 43-yard field goal by Robbie Gould. In the second quarter, Chicago added more points with a 35-yard field goal, and made it a 20-0 game when Devin Hester returned a punt 82 yards for a touchdown. Detroit finally got on the board with two consecutive field goals by Jason Hanson, from 29 and 35 yards out respectively. After halftime, the Bears defense intercepted Lions QB Matthew Stafford twice for touchdowns. First, Major Wright caught one and ran it in 24 yards. Then Charles Tillman completed a 44-yard pick 6. The Bears added to their large lead with a 50-yard field goal. The Lions scored their only points of the second half with a 10-yard touchdown catch by Tony Scheffler. This was the Lions' first road loss of the season. The game was marred by an on-field fight between players midway through the 4th quarter.

How many interceptions did Matthew Stafford throw?
2