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_15001957_1 (mixed_doubles VARCHAR, year VARCHAR)
### Question:
How many mixed doubles were won in 1996?
### Answer:
SELECT COUNT(mixed_doubles) FROM table_15001957_1 WHERE year = 1996