user: Question: What is the margin of victory for Nikki Garrett?
Columns: ['Year', 'Date', 'Venue', 'Winner', 'Country', 'Score', 'To par', 'Margin of victory', 'Runner(s)-up', "Winner's share ( € )"]
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play', 'Tenerife Ladies Match Play']
SQL:

assistant: SELECT "Margin of victory" FROM "Table" WHERE "Winner" = 'Nikki Garrett';