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_16384648_2 (joined_tschl VARCHAR, institution VARCHAR)
### Question:
What year did the university of Pittsburgh school join the hockey league? 
### Answer:
SELECT joined_tschl FROM table_16384648_2 WHERE institution = "University of Pittsburgh"