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_23399481_4 (us_viewers__in_millions_ VARCHAR, written_by VARCHAR)

### Question ###
How many millions of viewers did the episode written by Andrea Conway Kagey?

### Accurate SQL ###

SELECT us_viewers__in_millions_ FROM table_23399481_4 WHERE written_by = "Andrea Conway Kagey"