user: Question: When Alberto Contador Kanstantsin Sivtsov was the general classification and Alessandro Petacchi was the points classification at the same time while Mark Cavendish is the winner, who was the mountain classification?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Mountains classification', 'Young rider classification']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'HTC-Highroad', 'Marco Pinotti', 'not awarded', 'not awarded', 'Bjørn Selander']
SQL:

assistant: SELECT "Mountains classification" FROM "Table" WHERE "General classification" = 'Alberto Contador Kanstantsin Sivtsov' AND "Points classification" = 'Alessandro Petacchi' AND "Winner" = 'Mark Cavendish';