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_26776 ( "Conference" text, "Regular Season Winner" text, "Conference Player of the Year" text, "Conference Tournament" text, "Tournament Venue (City)" text, "Tournament Winner" text )

### Question ###
List the number of tournament winners when iona , siena & niagara won in the regular season.

### Accurate SQL ###

SELECT COUNT("Tournament Winner") FROM table_26776 WHERE "Regular Season Winner" = 'Iona , Siena & Niagara'