Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Region served | City | Channels ( Analog / Digital ) | First air date | ERP (Analog/ Digital) | HAAT (Analog/ Digital) 1 | Transmitter Location |
| --- | --- | --- | --- | --- | --- | --- |
| Cairns 2 | Cairns | 10 ( VHF ) 3 6 ( VHF ) | 7 September 1966 | 200 kW 50kW | 1177 m 1190 m | Mount Bellenden Ker |
| Darling Downs | Toowoomba | 41 ( UHF ) 3 40 ( UHF ) | 31 December 1990 | 1300kW 500kW | 515 m 520 m | Mount Mowbullan |
| Mackay | Mackay | 33 ( UHF ) 3 32 ( UHF ) | 31 December 1990 | 1300kW 360kW | 612 m 630 m | Mount Blackwood |
| Rockhampton | Rockhampton | 34 ( UHF ) 3 36 ( UHF ) | 31 December 1990 | 2000kW 500kW | 523 m 523 m | Mount Hopeful |
| Southern Downs | Warwick | 39 ( UHF ) 3 52 ( UHF ) | 31 December 1990 | 600kW 500kW | 301 m 301 m | Passchendaele Ridge |
| Townsville | Townsville | 7 ( VHF ) 3 36 ( UHF ) | 1 November 1962 | 200kW 200kW | 612 m 655 m | Mount Stuart |
| Wide Bay | Maryborough | 33 ( UHF ) 3 9 ( VHF ) | 31 December 1990 | 1000kW 60kW | 646 m 646 m | Mount Goonaneman |
Question:
What channels first aired on 31 December 1990 in the Southern Downs region?
Answer:
39 ( UHF ) 3 52 ( UHF )