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_23248420_1 (county VARCHAR, population VARCHAR)
### Question:
When 31901 is the population what is the county?
### Answer:
SELECT county FROM table_23248420_1 WHERE population = 31901