user: Question: What is the Hangul when the Hanja is 西, 徐?
Columns: ['Hangul', 'Hanja', 'Revised', 'McCune-Reischauer', '2000 n South Korea population *']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['김', '金', 'Gim', 'Kim', 9925949.0]
SQL:

assistant: SELECT "Hangul" FROM "Table" WHERE "Hanja" = '西, 徐';