user: Question: When Thomas Löfkvist is the  young rider classification and Alessandro Petacchi is the points classification who are the general classifications? 
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Mountains classification', 'Young rider classification']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Team Columbia-High Road', 'Mark Cavendish', 'no award', 'no award', 'Mark Cavendish']
SQL:

assistant: SELECT "General classification" FROM "Table" WHERE "Points classification" = 'Alessandro Petacchi' AND "Young rider classification" = 'Thomas Löfkvist';