user: Question: What was the fastest lap for Grand Prix Dutch TT?
Columns: ['Round', 'Date', 'Grand Prix', 'Circuit', 'Pole Position', 'Fastest Lap', 'Race Winner']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'March 29', 'Spanish Grand Prix', 'Jerez', 'Luis Salom', 'Daijiro Hiura', 'Luis Salom']
SQL:

assistant: SELECT "Fastest Lap" FROM "Table" WHERE "Grand Prix" = 'Dutch TT';