CREATE TABLE table_14944 ("Name" TEXT, "Years" TEXT, "Gender" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT, "Roll" FLOAT)

What authority controls the school in Levin that has a decile of 6, and a roll of 226?
SELECT "Authority" FROM table_14944 WHERE "Decile" = '6' AND "Area" = 'levin' AND "Roll" = '226'
SELECT "Authority" FROM "table_14944" WHERE "Area" = 'levin' AND "Decile" = '6' AND "Roll" = '226'