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_17257687_1 (air_date VARCHAR, event_1 VARCHAR)
  ### Question:
  On how many different dates was event 1 Suspension Bridge?
  ### Answer:
  SELECT COUNT(air_date) FROM table_17257687_1 WHERE event_1 = "Suspension Bridge"