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_31 (air_date VARCHAR, test_taker VARCHAR)
  ### Question:
  On which air date was Robert the test-taker?
  ### Answer:
  SELECT air_date FROM table_name_31 WHERE test_taker = "robert"