Table:
text: Sean Compton
The Tribune/LocalTV Programming Management Stations
The Tribune/LocalTV Programming Management Stations
Media_market_name Callsign Analog Digital Affiliation
American Cable Channel 75 Million Homes WGN America Varies NA Independent
Digital Television Networks Antenna TV/THIS TV Digital/Cable NA shows/movies
New York, New York WPIX 11 33 CW
Los Angeles, California KTLA 5 31 CW
Chicago, Illinois WGN-TV 9 19 CW
Philadelphia, Pennsylvania WPHL-TV 17 54 MyNetworkTV
Dallas / Fort Worth, Texas KDAF 33 32 CW
Washington, D.C. WDCW 50 51 CW
Houston,Texas KIAH 39 38 CW
Tacoma / Seattle, Washington KCPQ 13 18 Fox
Tacoma / Seattle, Washington KZJO 22 25 MyNetworkTV
Miami / Fort Lauderdale, Florida WSFL-TV 39 19 CW
Cleveland, Ohio WJW 8 31 Fox

Question: What is the call sign for the independent affiliation under Sean Compton?