CREATE TABLE store (store_id VARCHAR, store_name VARCHAR)
CREATE TABLE store_district (store_id VARCHAR, district_id VARCHAR)
CREATE TABLE district (headquartered_city VARCHAR, district_id VARCHAR)

Which city is the headquarter of the store named 'Blackville' in?
SELECT t3.headquartered_city FROM store AS t1 JOIN store_district AS t2 ON t1.store_id = t2.store_id JOIN district AS t3 ON t2.district_id = t3.district_id WHERE t1.store_name = "Blackville"
SELECT "t3"."headquartered_city" FROM "store" AS "t1" JOIN "store_district" AS "t2" ON "t1"."store_id" = "t2"."store_id" JOIN "district" AS "t3" ON "t2"."district_id" = "t3"."district_id" WHERE "Blackville" = "t1"."store_name"