user: Question: What is the date of the 4 strokes margin of victory?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['8 Oct 2000', 'Kolon Cup Korean Open', '–10 (70-69-69-70=278)', '1 stroke', 'Craig Kamps']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Margin of victory" = '4 strokes';