user: Question: What's the exponent field that has 255 exp and value of +∞?
Columns: ['Type', 'Actual Exponent', 'Exp (biased)', 'Exponent field', 'Significand (fraction field)', 'Value']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Zero', '−127', '0', '0000 0000', '000 0000 0000 0000 0000 0000', '0.0']
SQL:

assistant: SELECT "Exponent field" FROM "Table" WHERE "Exp (biased)" = '255' AND "Value" = '+∞';