CREATE TABLE table_51645 ("Club" TEXT, "City" TEXT, "Stadium" TEXT, "Capacity" FLOAT, "2011\\u201312 season" TEXT)

What city houses the Ciro Vigorito stadium?
SELECT "City" FROM table_51645 WHERE "Stadium" = 'ciro vigorito'
SELECT "City" FROM "table_51645" WHERE "Stadium" = 'ciro vigorito'