Question: In what city is the company that owns and operates KDEL Channel 20 headquartered?
Sentence (from "Captain 20"): Captain 20 was a fictional character, an astronaut (and later an alien) who hosted Washington, D.C.'s WDCA (Channel 20) afternoon children's television block of cartoons and live action shorts like "Ultraman", until TVX Broadcast Group (which later became Paramount Stations Group, now CBS Corporation) bought WDCA Channel 20.
Relevant evidence: No