user: Question: Who was the winner at the tournament in Hamburg?
Columns: ['Tournament', 'Surface', 'Week', 'Winner', 'Finalist', 'Semifinalists']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Indian Wells', 'Hard', 'March 12', 'Andre Agassi (4) 7–6(5), 7–5, 6–1', 'Pete Sampras (3)', 'Yevgeny Kafelnikov (7) Lleyton Hewitt (6)']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Tournament" = 'Hamburg';