user: Question: Which Withdrawn has a Previous Class of j69, and a Previous Number(s) smaller than 68532, and a Converted larger than 1959?
Columns: ['Number', 'Previous Number(s)', 'Previous Class', 'Converted', 'Withdrawn', 'Disposal']
Types: ['text', 'real', 'text', 'real', 'real', 'text']
Sample row: ['31 (1st)', 68383.0, 'J66', 1952.0, 1959.0, 'Scrapped (1959)']
SQL:

assistant: SELECT "Withdrawn" FROM "Table" WHERE "Previous Class" = 'j69' AND "Previous Number(s)" < 68532.0 AND "Converted" > 1959.0;