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_2135222_2 (traditional VARCHAR, density VARCHAR)

### Question ###
What is the traditional with density of 820?

### Accurate SQL ###

SELECT traditional FROM table_2135222_2 WHERE density = 820