user: ### NOW ANSWER:
Question: What is the Tenure of the Officer with a Date of death of 2001-08-31?
Columns: ['Name', 'Rank', 'Tenure', 'Date of death', 'Cause of death']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['James R. Barton', 'Sheriff', '—', '1857-01-23', 'Gunfire']
SQL:

assistant: SELECT "Tenure" FROM "Table" WHERE "Date of death" = '2001-08-31';