Which Callsign has an IATA of tr?
CREATE TABLE table_name_4 (callsign VARCHAR, iata VARCHAR)
SELECT callsign FROM table_name_4 WHERE iata = "tr"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_4 (callsign VARCHAR, iata VARCHAR) Question: Which Callsign has an IATA of tr? [/INST] SELECT callsign FROM table_name_4 WHERE iata = "tr" </s>