user: Question: Who is the mixed doubled on the tour Korea Super Series?
Columns: ['Tour', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Korea Super Series', 'Lee Chong Wei', 'Wang Shixian', 'Jung Jae-sung Lee Yong-dae', 'Cheng Shu Zhao Yunlei', 'He Hanbin Yu Yang']
SQL:

assistant: SELECT "Mixed doubles" FROM "Table" WHERE "Tour" = 'Korea Super Series';