SELECT T2.party_name FROM Member AS T1 JOIN party AS T2 ON T1.party_id  =  T2.party_id GROUP BY T1.party_id ORDER BY count(*) DESC LIMIT 1
Return the name of the party with the most members.
CREATE TABLE "region" (
"Region_ID" int,
"Region_name" text,
"Date" text,
"Label" text,
"Format" text,
"Catalogue" text,
PRIMARY KEY ("Region_ID")
);
CREATE TABLE "party" (
"Party_ID" int,
"Minister" text,
"Took_office" text,
"Left_office" text,
"Region_ID" int,
"Party_name" text,
PRIMARY KEY ("Party_ID"),
FOREIGN KEY (`Region_ID`) REFERENCES `region`(`Region_ID`)
);
CREATE TABLE "member" (
"Member_ID" int,
"Member_Name" text,
"Party_ID" text,
"In_office" text,
PRIMARY KEY ("Member_ID"),
FOREIGN KEY (`Party_ID`) REFERENCES `party`(`Party_ID`)
);
CREATE TABLE "party_events" (
"Event_ID" int,
"Event_Name" text,
"Party_ID" int,
"Member_in_charge_ID" int,
PRIMARY KEY ("Event_ID"),
FOREIGN KEY (`Party_ID`) REFERENCES `party`(`Party_ID`),
FOREIGN KEY (`Member_in_charge_ID`) REFERENCES `member`(`Member_ID`)
);
INSERT INTO  "region" VALUES (1,"United Kingdom","1 July 2002","Parlophone","CD","540 3622");
INSERT INTO  "party" VALUES ("1","Dr. Kwame Nkrumah (MP)","1957","1958",1,"Convention Peoples Party");
INSERT INTO  "member" VALUES (1,"Hon Tony Abbott",3,"1994–present");
INSERT INTO  "party_events" VALUES (1,"Annaual Meeting", 1,4);