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_2 ( joined VARCHAR, founded VARCHAR, current_conference VARCHAR )

### Question ###
What joined that was founded prior to year 1856 and whose current conference is the Big South (NCAA Division I)?

### Accurate SQL ###

SELECT joined FROM table_name_2 WHERE founded < 1856 AND current_conference = "big south (ncaa division i)"