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

Which parties have hosts of age above 50? Give me the party locations.
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"