What is the episode number that was first broadcast on 3 September 2010?
CREATE TABLE table_23575917_4 (episode VARCHAR, first_broadcast VARCHAR)
SELECT episode FROM table_23575917_4 WHERE first_broadcast = "3 September 2010"
### Context: CREATE TABLE table_23575917_4 (episode VARCHAR, first_broadcast VARCHAR) ### Question: What is the episode number that was first broadcast on 3 September 2010? ### Answer: SELECT episode FROM table_23575917_4 WHERE first_broadcast = "3 September 2010"