Instead of the Tony Romo vs Tom Brady match-up, Brandon Weeden started due to Romo's broken collarbone he suffered in Week 2. After the first three possessions of the game ended in punts, Amendola set the Patriots up with good field position with a 25-yard punt return to the Cowboys 45. After a 14-yard screen pass to Lewis to the 31, a 7-yard sack by Greg Hardy pushed the Patriots back to the 38, and they ultimately settled for a 49-yard field goal by Gostkowski. The Cowboys replied, driving to the Patriots 33 and Dan Bailey tied the game with a 51-yard field goal. Midway through the second quarter, the Patriots raced 55 yards in just over two minutes, scoring the first touchdown of the game on a 1-yard touchdown run by Brady, taking a 10-3 lead. The next three possessions of the game ended in punts, but with 0:53 seconds left in the half, the Patriots reached the Cowboys 39, and Gostkowski made the longest field-goal of his career, a 57-yarder, upping the lead to 13-3 at halftime. Brady was sacked five times in the first half. The Patriots increased their lead, stringing together a 9 play, 80-yard drive, scoring on a 10-yard touchdown pass from Brady to Lewis, increasing the lead to 20-3. The Cowboys countered, marching 75-yards in 15 plays to the Patriots 7, and trimmed the deficit to 20-6 on a 23-yard field goal. The Patriots struck again on their next drive, driving 80 yards in just 5 plays, scoring on a 59-yard touchdown pass from Brady to Edelman, widening the lead to 27-6. On the Cowboys next drive, after a 6-yard gain by Jason Witten to the Cowboys 43, he was stripped by Collins with Jonathan Freeny returning it to the Patriots 36. The Patriots turned the ball over on downs when Blount was tackled for no gain on 4th-and-1. The Cowboys drove to the Patriots 46 and Ryan intercepted Weeden at the Patriots 22, returning it 25 yards to the Patriots 47. The Patriots reached the Cowboys 16 and Gostkowski increased the lead to 30-6 on a 34-yard field goal. The Cowboys drove all the way to the Patriots 6, but turned the ball over on downs again. Once again Garoppolo took two knees and the game was over.
Question: How many points were the Cowboy's trailing by at the half?
Answer: 10