CREATE TABLE party (Location VARCHAR2, Party_ID VARCHAR2)
CREATE TABLE party_host (Host_ID VARCHAR2, Party_ID VARCHAR2)
CREATE TABLE HOST (Host_ID VARCHAR2, Age NUMBER)

Show the locations of parties with hosts older than 50.
SELECT T3.Location FROM party_host AS T1 JOIN HOST AS T2 ON T1.Host_ID = T2.Host_ID JOIN party AS T3 ON T1.Party_ID = T3.Party_ID WHERE T2.Age > 50
SELECT "T3"."Location" FROM "party_host" "T1" JOIN "HOST" "T2" ON "T1"."Host_ID" = "T2"."Host_ID" AND "T2"."Age" > 50 JOIN "party" "T3" ON "T1"."Party_ID" = "T3"."Party_ID"