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_name_4 ( title VARCHAR, genre VARCHAR, year VARCHAR, network VARCHAR )

### Question ###
What's the title when the genre is drama and network of KBS2 happening before 2011?

### Accurate SQL ###

SELECT title FROM table_name_4 WHERE year < 2011 AND network = "kbs2" AND genre = "drama"