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_88 ( year_joined INTEGER, mascot VARCHAR, size VARCHAR, previous_conference VARCHAR )

### Question ###
Which Year Joined has a Size larger than 93, and a Previous Conference of none (new school), and a Mascot of rebels?

### Accurate SQL ###

SELECT AVG(year_joined) FROM table_name_88 WHERE size > 93 AND previous_conference = "none (new school)" AND mascot = "rebels"