Return the cities with more than 3 airports in the United States.
SELECT city FROM airports WHERE country  =  'United States' GROUP BY city HAVING count(*)  >  3
SELECT city FROM airports WHERE country  =  'United States' GROUP BY city HAVING count(*)  >  3
[{'city': 'Anchorage'}, {'city': 'Atlanta'}, {'city': 'Burlington'}, {'city': 'Chicago'}, {'city': 'Columbus'}, {'city': 'Georgetown'}, {'city': 'Greenville'}, {'city': 'Houston'}, {'city': 'Jacksonville'}, {'city': 'Las Vegas'}, {'city': 'New York'}, {'city': 'Sacramento'}, {'city': 'San Antonio'}, {'city': 'Tucson'}]