user: Question: What is Opening, when White is Kramnik, when Year is less than 2001, and when Tournament is "Siemens Giants"?
Columns: ['White', 'Black', 'Year', 'Result', 'Moves', 'Tournament', 'Opening']
Types: ['text', 'text', 'real', 'text', 'real', 'text', 'text']
Sample row: ['Kramnik', 'Anand', 1994.0, '1–0', 26.0, 'Amber tournament', 'A33 English Opening']
SQL:

assistant: SELECT "Opening" FROM "Table" WHERE "White" = 'Kramnik' AND "Year" < 2001.0 AND "Tournament" = 'Siemens Giants';