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_83 (duration VARCHAR, start_date_time VARCHAR)

### Question ###
The EVA that started on 8 July 12:38 went for how long?

### Accurate SQL ###

SELECT duration FROM table_name_83 WHERE start_date_time = "8 july 12:38"