CREATE TABLE table_23157997_13 (youth_classification VARCHAR, mountains_classification VARCHAR, winner VARCHAR)

Who was the Youth Classification in the race with Kenneth Hanson as Mountains Classification and Lucas Sebastian Haedo as winner?
SELECT youth_classification FROM table_23157997_13 WHERE mountains_classification = "Kenneth Hanson" AND winner = "Lucas Sebastian Haedo"
SELECT "youth_classification" FROM "table_23157997_13" WHERE "Kenneth Hanson" = "mountains_classification" AND "Lucas Sebastian Haedo" = "winner"