user: Question: What was the margin of victory at the LPGA Championship?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sep 18, 1983', 'Safeco Classic', '–6 (69-71-72-71=283)', '1 stroke', 'Kathy Whitworth']
SQL:

assistant: SELECT "Margin of victory" FROM "Table" WHERE "Tournament" = 'LPGA Championship';