Table: can_int_badminton
Columns: year
men_s_singles
women_s_singles
men_s_doubles
women_s_doubles
mixed_doubles

Question: Which men's singles has mixed doubles with Kevin Cao Melody Liang?
SQL: SELECT "men_s_singles" FROM can_int_badminton WHERE "mixed_doubles" = 'kevin cao melody liang'

Question: Which men's singles has mixed doubles with Chen Hung-Ling Chou Chia-Chi?
SQL: SELECT "men_s_singles" FROM can_int_badminton WHERE "mixed_doubles" = 'chen hung-ling chou chia-chi'