CREATE TABLE district (headquartered_city VARCHAR, district_id VARCHAR); CREATE TABLE store_district (store_id VARCHAR, district_id VARCHAR); CREATE TABLE store (store_id VARCHAR)
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 GROUP BY t3.headquartered_city ORDER BY COUNT(*) DESC LIMIT 1
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Find the city with the most number of stores.