text: 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_21378160_2 (opponent VARCHAR, date VARCHAR)
  ### Question:
  How many opponents did they play on 17/05/2009?
  ### Answer:
  SELECT COUNT(opponent) FROM table_21378160_2 WHERE date = "17/05/2009"