Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_93 (exponent_field VARCHAR, exp__biased_ VARCHAR, value VARCHAR)
### Question:
What's the exponent field that has 255 exp and value of +∞?
### Answer:
SELECT exponent_field FROM table_name_93 WHERE exp__biased_ = "255" AND value = "+∞"