Table: tour_down_under_2010
Columns: stage
winner
general_classification
mountains_classification
sprint_classification
young_rider_classification
team_classification
aggressive_rider

Question: Who was the aggressive rider when the winner was luis león sánchez?
SQL: SELECT "aggressive_rider" FROM tour_down_under_2010 WHERE "winner" = 'Luis León Sánchez'

Question: Who was the aggressive rider when the sprint classification was  andré greipel and mountains classification was timothy roe?
SQL: SELECT "aggressive_rider" FROM tour_down_under_2010 WHERE "sprint_classification" = 'André Greipel' AND "mountains_classification" = 'Timothy Roe'

Question: What was the stage when the winner was luis león sánchez?
SQL: SELECT "stage" FROM tour_down_under_2010 WHERE "winner" = 'Luis León Sánchez'

Question: What was the young rider classification when manuel cardoso was the winner?
SQL: SELECT "young_rider_classification" FROM tour_down_under_2010 WHERE "winner" = 'Manuel Cardoso'

Question: How many winners were there for stage 5?
SQL: SELECT COUNT("winner") FROM tour_down_under_2010 WHERE "stage" = 5