user: Question: What was the margin of victory on Apr 8, 1979?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Jun 23, 1968', 'LPGA Championship', '+2 (72-75-74-73=294)', 'Playoff', 'Kathy Whitworth']
SQL:

assistant: SELECT "Margin of victory" FROM "Table" WHERE "Date" = 'Apr 8, 1979';