What are the different nationalities of pilots? Show each nationality and the number of pilots of each nationality.
SELECT Nationality ,  COUNT(*) FROM pilot GROUP BY Nationality
SELECT Nationality ,  COUNT(*) FROM pilot GROUP BY Nationality
[{'Nationality': 'Nigeria', 'COUNT(*)': 1}, {'Nationality': 'United Kindom', 'COUNT(*)': 1}, {'Nationality': 'United States', 'COUNT(*)': 3}]