Media in Pittsburgh

Columns: Channel | Call Sign | Network | Since | Owner
2 | KDKA | CBS | 1949 ( Jan. 11 ) | CBS | 4 | WTAE | ABC | 1958 ( Sept. 14 ) | Hearst | 11 | WPXI | NBC | 1957 ( Sept. 1 ) | Cox Media | 13 | WQED | PBS | 1954 ( Apr . 1 ) | 16 | WEPA-CD | Cozi TV | 1989 ( Feb. 28 ) | OTA Broadcasting | 19 | WPCW | The CW | 1953 ( Oct. 15 ) | CBS | 22 | WPNT | MyTV | 1978 ( Sept. 26 ) | Sinclair | 29 | WIIC | 1989 ( Aug. 29 ) | Abacus Television

Example questions:
in what downtown Dallas Texas building are the headquarters of the owner whose oldest channel on television is dedicated to sports in Pittsburgh ? | The oldest TV network in Pittsburgh has an owner that is a unit of what entity ? | The Network in Pittsburgh that has a listed channel , but no owner provides what type of media programming ? | What was the previous name of the only television network to come to Pittsburgh in the 90 's ?

Answers:
Whitacre Tower | ViacomCBS | educational television programming | America 's Collectibles Network