user
Instruction
Answer the question based on the provided table.


Table
Table Title: '' regarding 'List of Welsh principal areas by population'
Table Content:
| Rank | District | Population | Population density/km² | Styleand |
| --- | --- | --- | --- | --- |
| 1 | Cardiff | 362,800 | 2,574 | City and county |
| 2 | Swansea | 245,500 | 646 | City and county |
| 3 | Rhondda Cynon Taf | 239,100 | 563 | County borough |
| 4 | Carmarthenshire | 186,500 | 78 | County |
| 5 | Caerphilly | 180,800 | 651 | County borough |
| 6 | Flintshire | 155,200 | 354 | County |
| 7 | Newport | 151,500 | 795 | City and county |
| 8 | Bridgend | 144,300 | 575 | County borough |
| 9 | Neath Port Talbot | 142,100 | 321 | County borough |
| 10 | Wrexham | 135,600 | 269 | County borough |
| 11 | Powys | 132,500 | 25 | County |
| 12 | Vale of Glamorgan | 130,700 | 394 | County borough |
| 13 | Pembrokeshire | 124,700 | 77 | County |
| 14 | Gwynedd | 123,700 | 48 | County |
| 15 | Conwy | 116,900 | 103 | County borough |
| 16 | Denbighshire | 95,200 | 113 | County |
| 17 | Monmouthshire | 93,600 | 110 | County |
| 18 | Torfaen | 92,300 | 734 | County borough |
| 19 | Ceredigion | 73,100 | 40 | County |
| 20 | Isle of Anglesey | 69,800 | 98 | County |
| 21 | Blaenau Gwent | 69,600 | 640 | County borough |
| 22 | Merthyr Tydfil | 60,000 | 537 | County borough |


Question
What are the two most populous areas in Wales?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Swansea is the second most populous area in Wales, after Cardiff."]