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_19796 ( "Year" real, "Mens singles" text, "Womens singles" text, "Mens doubles" text, "Womens doubles" text, "Mixed doubles" text )

### Question ###
How many mixed doubles were there in the year that Olga Koseli won the women's singles?

### Accurate SQL ###

SELECT COUNT("Mixed doubles") FROM table_19796 WHERE "Womens singles" = 'Olga Koseli'