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_203_397 ( id number, "series" text, "launch date" text, "finale date" text, "days" number, "housemates" number, "winner" text, "main presenter" text, "grand prize" text, "liveshow\naudience\nmillions" number )

### Question ###
who has presented the most seasons ?

### Accurate SQL ###

SELECT "main presenter" FROM table_203_397 GROUP BY "main presenter" ORDER BY COUNT("series") DESC LIMIT 1