SELECT young_classification FROM table_name_26 WHERE general_classification = "christian vande velde" AND team_classification = "team columbia" AND sprint_classification = "mark cavendish"
Klasifikasi muda mana yang memiliki klasifikasi umum Christian Vande Velde untuk Tim Columbia dan Mark Cavendish?
CREATE TABLE table_name_26 (young_classification VARCHAR, sprint_classification VARCHAR, general_classification VARCHAR, team_classification VARCHAR)