Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT COUNT(french_head_of_state) FROM table_29474481_4 WHERE head_of_mission = "Xavier Daufresne de la Chevalerie"