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:
| Club | Played | Won | Drawn | Lost | Points for | Points against | Tries for | Points |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Club | Played | Won | Drawn | Lost | Points for | Points against | Tries for | Points |
| Garndiffaith RFC | 22 | 19 | 0 | 3 | 718 | 277 | 110 | 57 |
| Old Illtydians RFC | 22 | 19 | 0 | 3 | 536 | 342 | 77 | 57 |
| Nantyglo RFC | 22 | 15 | 0 | 7 | 546 | 374 | 73 | 45 |
| Monmouth RFC | 22 | 15 | 0 | 7 | 515 | 347 | 68 | 45 |
| Llandaff RFC | 22 | 12 | 0 | 10 | 475 | 384 | 68 | 36 |
| Risca RFC | 22 | 10 | 2 | 10 | 440 | 398 | 54 | 32 |
| Tredegar Ironsides RFC | 22 | 10 | 0 | 12 | 349 | 440 | 51 | 30 |
| Machen RFC | 22 | 8 | 2 | 12 | 345 | 404 | 49 | 26 |
| Llandaff North RFC | 22 | 7 | 2 | 13 | 481 | 523 | 66 | 23 |
| Talywain RFC | 22 | 6 | 0 | 16 | 267 | 577 | 36 | 18 |
| Crumlin RFC | 22 | 4 | 1 | 17 | 310 | 588 | 45 | 13 |
| Trinant RFC | 22 | 3 | 1 | 18 | 270 | 598 | 23 | 10 |
Question:
What club had 523 points against? 
Answer:
Llandaff North RFC