In week 14, the Lions returned home for a rematch with division rival the Chicago Bears, who defeated the Lions in Chicago in week 4. The Bears opened the scoring in the first quarter via a 38-yard field goal from Connor Barth. The Lions responded with 10 points in the second quarter via a 29-yard field goal from Matt Prater, and a 16-yard touchdown pass from Matthew Stafford to Anquan Boldin, which made the score 10-3 in favor of the Lions at half-time. The Lions extended their lead in the third quarter via a 54-yard field goal from Prater. The Bears reduced the Lions lead to three points via a 31-yard touchdown pass from Matt Barkley to Cameron Meredith. The Bears regained the lead in the fourth quarter via a 24-yard interception return from Cre'Von LeBlanc. The Lions responded with a seven-yard touchdown run from Stafford with 3:17 left in the game, giving the Lions a 20-17 lead they held onto for the win, and breaking an NFL record with 8 comebacks in a single season. With the win, the Lions have won five games in a row for the first time since 2011. The Lions have also held opponents to 20 points or fewer in seven straight games, their longest such streak since 1961.
Question: How many points were the Lions winning by at halftime?
Answer: 7