What is the call sign for channel 6?
CREATE TABLE table_2638104_1 (callsign VARCHAR, channel VARCHAR)
SELECT callsign FROM table_2638104_1 WHERE channel = 6
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2638104_1 (callsign VARCHAR, channel VARCHAR) Question: What is the call sign for channel 6? [/INST] SELECT callsign FROM table_2638104_1 WHERE channel = 6 </s>