What is the sex of the candidate who had the highest unsure rate?
SELECT t1.sex FROM people AS t1 JOIN candidate AS t2 ON t1.people_id  =  t2.people_id GROUP BY t1.sex ORDER BY avg(t2.unsure_rate) DESC LIMIT 1
SELECT t1.sex FROM people AS t1 JOIN candidate AS t2 ON t1.people_id  =  t2.people_id GROUP BY t1.sex ORDER BY avg(t2.unsure_rate) DESC LIMIT 1
[{'Sex': 'F'}]