When 31901 is the population what is the county?
CREATE TABLE table_23248420_1 (county VARCHAR, population VARCHAR)
SELECT county FROM table_23248420_1 WHERE population = 31901
### 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