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

Show the name and the nationality of the oldest host.
SELECT name, nationality FROM host ORDER BY age DESC LIMIT 1
SELECT "name", "nationality" FROM "host" ORDER BY "age" DESC NULLS LAST LIMIT 1