CREATE TABLE table_69234 ("Rank" TEXT, "Mine" TEXT, "County" TEXT, "Operator" TEXT, "Capacity  ( thousands of metric tons ) " TEXT)

What rank is the Silver Bell mine of Pima county?
SELECT "Rank" FROM table_69234 WHERE "County" = 'pima' AND "Mine" = 'silver bell'
SELECT "Rank" FROM "table_69234" WHERE "County" = 'pima' AND "Mine" = 'silver bell'