user: Question: Which championship has a margin of 8 strokes?
Columns: ['Year', 'Championship', '54 Holes', 'Winning Score', 'Margin', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1901.0, 'The Open Championship', '5 shot lead', '(79-76-74-80=309)', '3 strokes', 'Harry Vardon']
SQL:

assistant: SELECT "Championship" FROM "Table" WHERE "Margin" = '8 strokes';