CREATE TABLE "classification_leadership" (
  "stage" text,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "young_rider_classification" text
);

Question: What's the general classification of Ignatas Konovalovas when the mountains classification was Stefano Garzelli and points classification was Danilo Di Luca?
SQL: SELECT "general_classification" FROM "classification_leadership" WHERE "mountains_classification"='stefano garzelli' AND "points_classification"='danilo di luca' AND "winner"='ignatas konovalovas';

Question: What's the mountains classification when the points classification is Alessandro Petacchi and the general classification is Danilo Di Luca?
SQL: SELECT "mountains_classification" FROM "classification_leadership" WHERE "points_classification"='alessandro petacchi' AND "general_classification"='danilo di luca';

Question: Who was the winner of Stage 9 when then general classification was Danilo Di Luca?
SQL: SELECT "winner" FROM "classification_leadership" WHERE "general_classification"='danilo di luca' AND "stage"='9';

Question: What is the stage of winner Carlos Sastre when the general classification was Denis Menchov?
SQL: SELECT "stage" FROM "classification_leadership" WHERE "general_classification"='denis menchov' AND "winner"='carlos sastre';

Question: What's the points classification of Stage 18 when the general classification was Denis Menchov?
SQL: SELECT "points_classification" FROM "classification_leadership" WHERE "general_classification"='denis menchov' AND "stage"='18';

Question: What's the mountains classification of winner Carlos Sastre when the general classification is Denis Menchov?
SQL: SELECT "mountains_classification" FROM "classification_leadership" WHERE "general_classification"='denis menchov' AND "winner"='carlos sastre';