How many hosts does each nationality have? List the nationality and the count.
SELECT Nationality ,  COUNT(*) FROM HOST GROUP BY Nationality
SELECT Nationality ,  COUNT(*) FROM HOST GROUP BY Nationality
[{'Nationality': 'Argentina', 'COUNT(*)': 1}, {'Nationality': 'Hungary', 'COUNT(*)': 1}, {'Nationality': 'United States', 'COUNT(*)': 8}]