After their home win over the Lions, the Vikings flew to Bill Walsh Field at Monster Park for a Week 14 contest with the San Francisco 49ers. In the first quarter, Minnesota scored first as DT Kevin Williams returned an interception 18 yards for a touchdown, along with kicker Ryan Longwell getting a 48-yard field goal. In the second quarter, the Vikings added to their lead as QB Tarvaris Jackson completed a 19-yard TD pass to WR Robert Ferguson. Longwell hit a 46-yard field goal, and RB Chester Taylor completed an 84-yard TD run. In the third quarter, the 49ers would get their only score of the game as QB Shaun Hill completed a 5-yard TD pass to WR Arnaz Battle. Rookie RB Adrian Peterson ended the day with a career-low 3 yards rushing on 14 carries.. How many points did the Vikings score in the first quarter?