What year did the university of Pittsburgh school join the hockey league? 
CREATE TABLE table_16384648_2 (joined_tschl VARCHAR, institution VARCHAR)
SELECT joined_tschl FROM table_16384648_2 WHERE institution = "University of Pittsburgh"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_16384648_2 (joined_tschl VARCHAR, institution VARCHAR) Question: What year did the university of Pittsburgh school join the hockey league?  [/INST] SELECT joined_tschl FROM table_16384648_2 WHERE institution = "University of Pittsburgh" </s>