user: Question: Which competition had an opponent of Police at the Selayang Stadium?
Columns: ['Date', 'Venue', 'Opponent', 'Score', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['December 13, 2007', 'KLFA Stadium, Cheras', 'Malacca', '1-0', 'Premier League']
SQL:

assistant: SELECT "Competition" FROM "Table" WHERE "Opponent" = 'Police' AND "Venue" = 'Selayang Stadium';