user: Question: What date has an against of Pohang Steelers?
Columns: ['Round', 'Date', 'Against', 'Score AUFC – Away', 'Attendance', 'Weekday']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['2', '19 March 2008', 'Changchun Yatai', '0 – 0', 10510.0, 'Wednesday']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Against" = 'Pohang Steelers';