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_81 (nationality VARCHAR, heat VARCHAR, time VARCHAR)
### Question:
what is the nationality when the heat is less than 3 and the time is 2:35.31?
### Answer:
SELECT nationality FROM table_name_81 WHERE heat < 3 AND time = "2:35.31"