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_name_23 (avg_speed VARCHAR, distance VARCHAR, winning_driver VARCHAR)
### Question:
What was the average speed over 18.00km for winning driver Jean-Claude Andruet?
### Answer:
SELECT avg_speed FROM table_name_23 WHERE distance = "18.00km" AND winning_driver = "jean-claude andruet"