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_21025 ( "Rnd" real, "Race Name" text, "Circuit" text, "City/Location" text, "Date" text, "Pole position" text, "Fastest lap" text, "Winning driver" text, "Winning team" text, "Report" text )

### Question ###
FOR AUGUST 13 WHAT IS THE RND ?

### Accurate SQL ###

SELECT MAX("Rnd") FROM table_21025 WHERE "Date" = 'August 13'