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
### Context: CREATE TABLE table_2638104_1 (callsign VARCHAR, channel VARCHAR) ### Question: What is the call sign for channel 6? ### Answer: SELECT callsign FROM table_2638104_1 WHERE channel = 6