user: Question: How many teams have a combination classification of Alejandro Valverde and a Points classification of Alessandro Petacchi?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Mountains classification', 'Combination classification', 'Team classification']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'ONCE-Eroski', 'Igor González de Galdeano', 'Igor González de Galdeano', 'Jan Hruška', 'Igor González de Galdeano', 'ONCE-Eroski']
SQL:

assistant: SELECT COUNT("Team classification") FROM "Table" WHERE "Combination classification" = 'Alejandro Valverde' AND "Points classification" = 'Alessandro Petacchi';