What's the first aired date when Professor Hubert Whitehead was the role?
CREATE TABLE table_name_30 (first_aired VARCHAR, role VARCHAR)
SELECT first_aired FROM table_name_30 WHERE role = "professor hubert whitehead"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_30 (first_aired VARCHAR, role VARCHAR) Question: What's the first aired date when Professor Hubert Whitehead was the role? [/INST] SELECT first_aired FROM table_name_30 WHERE role = "professor hubert whitehead" </s>