Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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?
### Answer:
SELECT COUNT(mixed_doubles) FROM table_15002177_1 WHERE womens_singles = "Olga Koseli"