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_4585 ( "Stage" text, "Start time" text, "Stage name" text, "Distance" text, "Winning driver" text, "Time" text, "Avg. Speed" text, "Rally leader" text )

### Question ###
What was the average speed over 18.00km for winning driver Jean-Claude Andruet?

### Accurate SQL ###

SELECT "Avg. Speed" FROM table_4585 WHERE "Distance" = '18.00km' AND "Winning driver" = 'jean-claude andruet'