CREATE TABLE host (Host_ID INT, Name TEXT, Nationality TEXT, Age TEXT)
CREATE TABLE party (Party_ID INT, Party_Theme TEXT, Location TEXT, First_year TEXT, Last_year TEXT, Number_of_hosts INT)
CREATE TABLE party_host (Party_ID INT, Host_ID INT, Is_Main_in_Charge BOOLEAN)

Create a pie chart showing the total number across nationality.
SELECT Nationality, COUNT(*) FROM host GROUP BY Nationality
SELECT "Nationality", COUNT(*) FROM "host" GROUP BY "Nationality"