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_81 (semi_finalists VARCHAR, runner_up VARCHAR)

### Question ###
Who were the semi finalists when Alexia Dechaume-Balleret Sandrine testud was the runner-up?

### Accurate SQL ###

SELECT semi_finalists FROM table_name_81 WHERE runner_up = "alexia dechaume-balleret sandrine testud"