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_40 ( type VARCHAR, formed_from VARCHAR )

### Question ###
Name the typed for formed from 6-pul trailer third in res unit

### Accurate SQL ###

SELECT type FROM table_name_40 WHERE formed_from = "6-pul trailer third in res unit"