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_20 (hometown VARCHAR, position VARCHAR, college VARCHAR)

### Question ###
What is the hometown for the player that is defensive back and went to alabama?

### Accurate SQL ###

SELECT hometown FROM table_name_20 WHERE position = "defensive back" AND college = "alabama"