user: Question: Who had the fastest lap on September 4?
Columns: ['Rnd', 'Circuit', 'Location', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Winning team', 'Supporting']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Streets of St. Petersburg', 'St. Petersburg, Florida', 'March 26', 'Martin Scuncio', 'Connor De Phillippi', 'Connor De Phillippi', 'Team Pelfrey', 'IndyCar Series']
SQL:

assistant: SELECT "Fastest lap" FROM "Table" WHERE "Date" = 'September 4';