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_27833186_1 (rider_names VARCHAR, horse_name VARCHAR)
### Question:
How many different riders are there that won riding Omr Tsunami?
### Answer:
SELECT COUNT(rider_names) FROM table_27833186_1 WHERE horse_name = "OMR Tsunami"