Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_23157997_13 (youth_classification VARCHAR, mountains_classification VARCHAR, winner VARCHAR)

### Question ###
Who was the Youth Classification in the race with Kenneth Hanson as Mountains Classification and Lucas Sebastian Haedo as winner?

### Accurate SQL ###

SELECT youth_classification FROM table_23157997_13 WHERE mountains_classification = "Kenneth Hanson" AND winner = "Lucas Sebastian Haedo"