Original sentence: Vettel's team-mate Mark Webber, who signed a new one-year contract before the race weekend, was 1.5 points behind Vettel and 1.5 points ahead of Button's team-mate Rubens Barrichello
Edited sentence: Vettel's team-mate Mark Webber, who signed a new one-year contract before the race weekend, was 1.5 points behind Vettel and an equal number ahead of Button's team-mate Rubens Barrichello