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_23465864_3 (sat_29_aug VARCHAR, rider VARCHAR)

### Question ###
When  roy richardson 476cc aermacchi is the rider what is the time for saturday august 9th?

### Accurate SQL ###

SELECT sat_29_aug FROM table_23465864_3 WHERE rider = "Roy Richardson 476cc Aermacchi"