CREATE TABLE table_name_26 (young_classification VARCHAR(255), sprint_classification VARCHAR(255), general_classification VARCHAR(255), team_classification VARCHAR(255))
Which young classification has general classification of Christian Vande Velde for Team Columbia and Mark Cavendish?
    
SQL: SELECT young_classification FROM table_name_26 WHERE general_classification = "christian vande velde" AND team_classification = "team columbia" AND sprint_classification = "mark cavendish"