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_89 ( part_number_s_ VARCHAR, model_number VARCHAR )

### Question ###
What is the part number of athlon x2 4850e?

### Accurate SQL ###

SELECT part_number_s_ FROM table_name_89 WHERE model_number = "athlon x2 4850e"