user: Question: Which championship had a margin of 10 strokes?
Columns: ['Year', 'Championship', 'Winning score', 'Margin', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1965.0, 'Titleholders Championship', '–1 (71-71-74-71=287)', '10 strokes', 'Peggy Wilson']
SQL:

assistant: SELECT "Championship" FROM "Table" WHERE "Margin" = '10 strokes';