user: Question: At what venue is the margin of victory 7 strokes?
Columns: ['Year', 'Date', 'Venue', 'Champion', 'Country', 'Score', 'To par', 'Margin of victory', 'Purse ( $ )', "Winner's share ($)"]
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'real', 'real']
Sample row: [2000.0, 'Aug 17–20', 'Royal Birkdale Golf Club', 'Sophie Gustafson', 'Sweden', 282.0, '–6', '2 strokes', 1250000.0, 178000.0]
SQL:

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