user: Question: How many cars does Gregg Mixon own?
Columns: ['Team', 'Car(s)', '#', 'Driver(s)', 'Primary Sponsor(s)', 'Listed Owner(s)', 'Crew Chief']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Akins Motorsports', 'Chevrolet Monte Carlo', 38.0, 'Kasey Kahne', 'Great Clips', 'Brad Akins', 'Jon Wolfe']
SQL:

assistant: SELECT COUNT("Car(s)") FROM "Table" WHERE "Listed Owner(s)" = 'Gregg Mixon';