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_171320_3 (region_1 VARCHAR, region_4 VARCHAR)

### Question ###
Name the region 1 where region 4 for april 2, 2009

### Accurate SQL ###

SELECT region_1 FROM table_171320_3 WHERE region_4 = "April 2, 2009"