CREATE TABLE region (region_id DECIMAL, region_name TEXT, date TEXT, label TEXT, format TEXT, catalogue TEXT)
CREATE TABLE member (member_id DECIMAL, member_name TEXT, party_id TEXT, in_office TEXT)
CREATE TABLE party_events (event_id DECIMAL, event_name TEXT, party_id DECIMAL, member_in_charge_id DECIMAL)
CREATE TABLE party (party_id DECIMAL, minister TEXT, took_office TEXT, left_office TEXT, region_id DECIMAL, party_name TEXT)

What are the names of parties that have no members?
SELECT party_name FROM party WHERE NOT party_id IN (SELECT party_id FROM member)
SELECT "party_name" FROM "party" WHERE NOT "party_id" IN (SELECT "party_id" FROM "member")