Daily Empress Indy Silverstone took place on which round?
CREATE TABLE table_22673956_1 (rnd INTEGER, race_name VARCHAR)
SELECT MAX(rnd) FROM table_22673956_1 WHERE race_name = "Daily Empress Indy Silverstone"
### Context: CREATE TABLE table_22673956_1 (rnd INTEGER, race_name VARCHAR) ### Question: Daily Empress Indy Silverstone took place on which round? ### Answer: SELECT MAX(rnd) FROM table_22673956_1 WHERE race_name = "Daily Empress Indy Silverstone"