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_3 (opened INTEGER, category VARCHAR)
  ### Question:
  Which Opened has a Category of diesel light rail?
  ### Answer:
  SELECT MAX(opened) FROM table_name_3 WHERE category = "diesel light rail"