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_22753439_1 (winner VARCHAR, runner_up_a VARCHAR)
### Question:
How many winners have a runner-up of A. Karthikeyan?
### Answer:
SELECT COUNT(winner) FROM table_22753439_1 WHERE runner_up_a = "A. Karthikeyan"