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?
create table table_2267345_2 (team_classification varchar, young_rider_classification varchar, combativity_award varchar, PRIMARY KEY (team_classification))
select count(team_classification) from table_2267345_2 where young_rider_classification = "salvatore commesso" and combativity_award = "jacky durand"