How many mixed doubles were there in the year that Olga Koseli won the women's singles?
CREATE TABLE table_15002177_1 (mixed_doubles VARCHAR, womens_singles VARCHAR)
SELECT COUNT(mixed_doubles) FROM table_15002177_1 WHERE womens_singles = "Olga Koseli"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT COUNT(mixed_doubles) FROM table_15002177_1 WHERE womens_singles = "Olga Koseli" </s>