Table: road_cycling_results
Columns: date
event
winner
team
series_leader

Question: What is the Series leader with a Date that is may 31?
SQL: SELECT "series_leader" FROM road_cycling_results WHERE "date" = 'may 31'

Question: What is the Series leader with a Date that is october 9?
SQL: SELECT "series_leader" FROM road_cycling_results WHERE "date" = 'october 9'