CREATE TABLE table_name_18 (sprints_classification VARCHAR(255), points_classification VARCHAR(255), team_classification VARCHAR(255))
What Sprints classification has the Points classification, Mark Cavendish and Team classification, Caisse D'epargne?
    
SQL: SELECT sprints_classification FROM table_name_18 WHERE points_classification = "mark cavendish" AND team_classification = "caisse d'epargne"