user: Question: What is the highest pick number of a Defensive Back with less than 136 overall points?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 25.0, 25.0, 'Bobby Butler', 'Cornerback', 'Florida State']
SQL:

assistant: SELECT MAX("Pick #") FROM "Table" WHERE "Overall" < 136.0 AND "Position" = 'Defensive Back';