CREATE TABLE party_host (party_id DECIMAL, host_id DECIMAL, is_main_in_charge others)
CREATE TABLE party (party_id DECIMAL, party_theme TEXT, location TEXT, first_year TEXT, last_year TEXT, number_of_hosts DECIMAL)
CREATE TABLE host (host_id DECIMAL, name TEXT, nationality TEXT, age TEXT)

Show different nationalities along with the number of hosts of each nationality.
SELECT nationality, COUNT(*) FROM host GROUP BY nationality
SELECT "nationality", COUNT(*) FROM "host" GROUP BY "nationality"