user: Question: Who won on 28 May?
Columns: ['Date', 'Course', 'Distance', 'Winner', 'Race Leader']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['18 May', 'Milan to Cremona', 'km (mi)', 'Vasco Bergamaschi ( ITA )', 'Vasco Bergamaschi ( ITA )']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Date" = '28 May';