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_25255 ( "Conference" text, "Regular Season Winner" text, "Conference Player of the Year" text, "Conference Tournament" text, "Tournament Venue (City)" text, "Tournament Winner" text )

### Question ###
When the Border Conference was held, who was the tournament winner?

### Accurate SQL ###

SELECT "Tournament Winner" FROM table_25255 WHERE "Conference" = 'Border Conference'