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_15002177_1 (mixed_doubles VARCHAR, womens_singles VARCHAR)

### 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_15002177_1 WHERE womens_singles = "Olga Koseli"