Table: tour_de_france_2009
Columns: stage
winner
general_classification
points_classification
mountains_classification
young_rider_classification
team_classification
combativity_award

Question: Who led the points classification when Roman Kreuziger led the young rider classification?
SQL: SELECT "points_classification" FROM tour_de_france_2009 WHERE "young_rider_classification" = 'Roman Kreuziger'

Question: Who won the stage when Fumiyuki Beppu won the combativity award?
SQL: SELECT "winner" FROM tour_de_france_2009 WHERE "combativity_award" = 'Fumiyuki Beppu'

Question: Who won stage 18?
SQL: SELECT "winner" FROM tour_de_france_2009 WHERE "stage" = 18

Question: Who won the stage when Mark Cavendish led the points classification, Rinaldo Nocentini led the general classification, and the stage was less than 11.0?
SQL: SELECT "winner" FROM tour_de_france_2009 WHERE "points_classification" = 'Mark Cavendish' AND "general_classification" = 'Rinaldo Nocentini' AND "stage" < 11.0