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_29474481_4 (french_head_of_state VARCHAR, head_of_mission VARCHAR)

### Question ###
How many French heads of state have a head of mission of Xavier Daufresne de la Chevalerie?

### Accurate SQL ###

SELECT COUNT(french_head_of_state) FROM table_29474481_4 WHERE head_of_mission = "Xavier Daufresne de la Chevalerie"