Original: During the test at the Silverstone Circuit during September, GP2 Series drivers Lewis Hamilton, Nelson Piquet, Jr., and Adrian Valles performed test duties for McLaren, Renault and Midland F1, respectively.
Simplified: During the test at the Silverstone Circuit during September, GP2 Series drivers Lewis Hamilton, Nelson Piquet Jr, and Adrian Valles performed test duties for McLaren, Renault and Midland F1, respectively.