user: Question: What is the Margin when the Winning score is +8 (70-69-70-75=284)?
Columns: ['Year', 'Championship', 'Winning score', 'Margin', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1946.0, 'Titleholders Championship', '+14 (80-77-77-80=314)', '2 strokes', 'Eileen Stulb']
SQL:

assistant: SELECT "Margin" FROM "Table" WHERE "Winning score" = '+8 (70-69-70-75=284)';