user: Question: For which tournament was the margin of victory 7 strokes?
Columns: ['Date', 'Tournament', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['16 Apr 1989', 'Credit Lyonnais Cannes Open', '–9 (65-70-72=207)', '1 stroke', 'Jimmy Heggarty , Brett Ogle , Peter Senior']
SQL:

assistant: SELECT "Tournament" FROM "Table" WHERE "Margin of victory" = '7 strokes';