Table: nor_int_badminton
Columns: year
men_s_singles
women_s_singles
men_s_doubles
women_s_doubles
mixed_doubles

Question: What players played mixed doubles when zhang xi played mixed singles?
SQL: SELECT "mixed_doubles" FROM nor_int_badminton WHERE "women_s_singles" = 'zhang xi'

Question: What player played women's singles when marcus ellis heather olver played mixed doubles?
SQL: SELECT "women_s_singles" FROM nor_int_badminton WHERE "mixed_doubles" = 'marcus ellis heather olver'

Question: What player played women's doubles when lee jae-jin lee eun-woo played mixed doubles?
SQL: SELECT "women_s_doubles" FROM nor_int_badminton WHERE "mixed_doubles" = 'lee jae-jin lee eun-woo'

Question: What year did helle nielsen marie røpke play womens' doubles?
SQL: SELECT "year" FROM nor_int_badminton WHERE "women_s_doubles" = 'helle nielsen marie røpke'

Question: What is the latest year that chou tien-chen played men's singles?
SQL: SELECT MAX("year") FROM nor_int_badminton WHERE "men_s_singles" = 'chou tien-chen'