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_name_19 (opened INTEGER, manufacturer VARCHAR)
  ### Question:
  Which average Opened has a Manufacturer of vekoma?
  ### Answer:
  SELECT AVG(opened) FROM table_name_19 WHERE manufacturer = "vekoma"