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_name_31 (competition VARCHAR, opponent VARCHAR, venue VARCHAR)
### Question:
Which competition had an opponent of Police at the Selayang Stadium?
### Answer:
SELECT competition FROM table_name_31 WHERE opponent = "police" AND venue = "selayang stadium"