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_name_13 (result VARCHAR, venue VARCHAR, year VARCHAR, event VARCHAR)

### Question ###
Wat was the result for the 20 km after 2008 when the venue was Metz, France?

### Accurate SQL ###

SELECT result FROM table_name_13 WHERE year > 2008 AND event = "20 km" AND venue = "metz, france"