user: Question: Who had the fastest lap in round 15?
Columns: ['Rd.', 'Grand Prix', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Constructor', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Australian Grand Prix', 'Kimi Räikkönen', 'Kimi Räikkönen', 'Kimi Räikkönen', 'Ferrari', 'Report']
SQL:

assistant: SELECT "Fastest Lap" FROM "Table" WHERE "Rd." = 15.0;