Coming off their divisional road win over the Redskins, the Cowboys went home, donned their throwback uniforms, and played a Week 12 game with the San Francisco 49ers. In the first quarter, Dallas trailed early as 49ers kicker Joe Nedney made a 23-yard and a 22-yard field goal. In the second quarter, the Cowboys took a lead as QB Tony Romo completed a 75-yard TD pass to WR Terrell Owens, LB Carlos Polk blocked an Andy Lee punt into the back of the 49ers' endzone for a safety, kicker Nick Folk making a 48-yard and a 41-yard field goal, and Romo throwing a 45-yard pass to T.O., Then completing a 1-yard TD pass to TE Martellus Bennett. In the third quarter, the Cowboys increased their lead as Romo completed a 10-yard TD pass to WR Patrick Crayton.  San Francisco answered with Nedney getting a 35-yard field goal.  In the fourth quarter, the 'Boys replied with Folk getting a 47-yard field goal.  The 49ers would try to stay in pace as QB Shaun Hill completed an 18-yard TD pass to WR Isaac Bruce, yet Dallas pulled away as Folk nailed a 42-yard field goal.  The 49ers tried to come back as Hill completed a 9-yard TD pass to RB DeShaun Foster, yet Dallas's defense held from there on out. Terrell Owens, having gone through 14-straight games without having a 100-yard receiving day, snapped his futuility streak by having 7 catches for 213 yards and a touchdown.  His 213 receiving yards would be his 2nd-highest single game total in his career. Tony Romo finish with another 300 yard game giving him 13 300 yard games.
Question: How many points was Dallas leading at halftime?
Answer: 23