user: Question: Which runner(s)-up had a Winning score of –13 (68-70-66-71=275) and a Margin of victory of 3 strokes?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sep 28, 1986', 'Southwest Golf Classic', '–13 (68-70-66-71=275)', '3 strokes', 'Tom Byrum']
SQL:

assistant: SELECT "Runner(s)-up" FROM "Table" WHERE "Margin of victory" = '3 strokes' AND "Winning score" = '–13 (68-70-66-71=275)';