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_26257223_13 ( team_classification VARCHAR, winner VARCHAR )

### Question ###
Who led team classification during the stage whose winner was Chris Horner?

### Accurate SQL ###

SELECT team_classification FROM table_26257223_13 WHERE winner = "Chris Horner"