user: Question: Who had the fastest lap in the race won by Team Impul at the Twin Ring Motegi circuit?
Columns: ['Round', 'Circuit', 'Date', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Team']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Fuji Speedway', '6 April', 'Tsugio Matsuda', 'Yuji Tachikawa', 'Tsugio Matsuda', 'Team Impul']
SQL:

assistant: SELECT "Fastest Lap" FROM "Table" WHERE "Winning Team" = 'Team Impul' AND "Circuit" = 'Twin Ring Motegi';