user: Question: What was the margin of victory for the win with a score of 71-69-71-70=281?
Columns: ['Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['6 Jun 2010', 'Memorial Tournament', '65-69-70-66=270', '−18', '3 strokes', 'Rickie Fowler']
SQL:

assistant: SELECT "Margin of victory" FROM "Table" WHERE "Winning score" = '71-69-71-70=281';