Who is the call sign that has a commenced operation before 1976?
CREATE TABLE table_name_3 (callsign VARCHAR, commenced_operations INTEGER)
SELECT callsign FROM table_name_3 WHERE commenced_operations < 1976
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_3 (callsign VARCHAR, commenced_operations INTEGER) Question: Who is the call sign that has a commenced operation before 1976? [/INST] SELECT callsign FROM table_name_3 WHERE commenced_operations < 1976 </s>