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_30 (first_aired VARCHAR, role VARCHAR)
  ### Question:
  What's the first aired date when Professor Hubert Whitehead was the role?
  ### Answer:
  SELECT first_aired FROM table_name_30 WHERE role = "professor hubert whitehead"