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_22673956_1 ( rnd INTEGER, race_name VARCHAR )

### Question ###
Daily Empress Indy Silverstone took place on which round?

### Accurate SQL ###

SELECT MAX(rnd) FROM table_22673956_1 WHERE race_name = "Daily Empress Indy Silverstone"