Answer based on context:

Seattle quarterback Charlie Whitehurst's first career start was one to forget; the Giants defense held Matt Hasselbeck's backup to just 113 passing yards in New York's biggest win of the year to this point. The Giants scored 38 unanswered points in the first three quarters, including touchdowns by four different players; two Bradshaw runs, a 46-yard pass to Nicks, and short touchdown passes to Smith and Boss. Whitehurst finally recorded his first NFL touchdown pass in the fourth quarter, connecting on a 36-yard pass to receiver Ben Obomanu. But the Giants put together a 13-minute drive, in which all snaps were taken by Sage Rosenfels, to take nearly all the remaining time off the clock. The Giants had earned their first win at Seattle since 1981, and extended their winning streak to five games.

How many minutes did the Giants drive?
13