Table schema:
CREATE TABLE candidate (people_id VARCHAR); CREATE TABLE people (name VARCHAR, sex VARCHAR, people_id VARCHAR)

Question: Find the name of the candidates whose oppose percentage is the lowest for each sex.
SQL: SELECT t1.name, t1.sex, MIN(oppose_rate) FROM people AS t1 JOIN candidate AS t2 ON t1.people_id = t2.people_id GROUP BY t1.sex