user: Question: Name the number for margin of victory being 3 strokes
Columns: ['No.', 'Date', 'Tournament', 'Winning score', 'To par', 'Margin of victory', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '20 Feb 2005', 'Titanium Enterprises ALPG Players Championship', '69-69-70=208', '–8', '3 strokes', 'Lynnette Brooky']
SQL:

assistant: SELECT "No." FROM "Table" WHERE "Margin of victory" = '3 strokes';