user: Question: Walter Giles is Crew Chief of what team?
Columns: ['Team', 'Car(s)', 'Driver(s)', 'Primary Sponsor(s)', 'Owner(s)', 'Crew Chief', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Circle Sport', 'Chevrolet SS', 'Tony Raines', "Little Joe's Auto", 'Joe Falk', 'John Rahlf', 25.0]
SQL:

assistant: SELECT "Team" FROM "Table" WHERE "Crew Chief" = 'Walter Giles';