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 EVENTS (event_id VARCHAR); CREATE TABLE Participants_in_Events (event_id VARCHAR)
  ### Question:
  How many events did not have any participants?
  ### Answer:
  SELECT COUNT(*) FROM EVENTS WHERE NOT event_id IN (SELECT event_id FROM Participants_in_Events)