which gender got the highest average uncertain ratio.
CREATE TABLE candidate (
    candidate_id number,
    people_id number,
    poll_source text,
    date text,
    support_rate number,
    consider_rate number,
    oppose_rate number,
    unsure_rate number
)

CREATE TABLE people (
    people_id number,
    sex text,
    name text,
    date_of_birth text,
    height number,
    weight number
)
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
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: which gender got the highest average uncertain ratio. ### Input: CREATE TABLE candidate (
    candidate_id number,
    people_id number,
    poll_source text,
    date text,
    support_rate number,
    consider_rate number,
    oppose_rate number,
    unsure_rate number
)

CREATE TABLE people (
    people_id number,
    sex text,
    name text,
    date_of_birth text,
    height number,
    weight number
) ### Response: 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