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_12164707_1 (mixed_doubles VARCHAR, mens_singles VARCHAR)
### Question:
How many Mixed Doubles won when Oliver Pongratz won the Men's Singles?
### Answer:
SELECT COUNT(mixed_doubles) FROM table_12164707_1 WHERE mens_singles = "Oliver Pongratz"