user: Question: What is the total number of team classifications when the young rider classification leader was Salvatore Commesso and the combativity award winner was Jacky Durand?
Columns: ['Stage', 'Winner', 'General classification', 'Points classification', 'Mountains classification', 'Young rider classification', 'Team classification', 'Combativity award']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'David Millar', 'David Millar', 'David Millar', 'Marcel Wüst', 'David Millar', 'US Postal', 'N/A']
SQL:

assistant: SELECT COUNT("Team classification") FROM "Table" WHERE "Young rider classification" = 'Salvatore Commesso' AND "Combativity award" = 'Jacky Durand';