user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'As the German UB-43' regarding 'SM UB-43'
Table Content:
| Date | Name | Nationality | Tonnage | Fate |
| --- | --- | --- | --- | --- |
| 14 September 1916 | Italiana | United Kingdom | 2,663 | Sunk |
| 17 September 1916 | Dewa | United Kingdom | 3,802 | Sunk |
| 17 September 1916 | Lord Tredegar | United Kingdom | 3,856 | Sunk |
| 10 October 1916 | Elax | United Kingdom | 3,980 | Sunk |
| 13 October 1916 | Welsh Prince | United Kingdom | 4,934 | Sunk |
| 3 November 1916 | Statesman | United Kingdom | 6,153 | Sunk |
| 4 November 1916 | Clan Leslie | United Kingdom | 3,937 | Sunk |
| 4 November 1916 | Huntsvale | United Kingdom | 5,398 | Sunk |
| 6 November 1916 | Arabia | United Kingdom | 7,903 | Sunk |
| 12 November 1916 | Kapunda | United Kingdom | 3,383 | Sunk |
| 13 December 1916 | Bretwalda | United Kingdom | 4,037 | Sunk |
| 14 December 1916 | Russian | United Kingdom | 8,825 | Sunk |
| 14 December 1916 | Westminster | United Kingdom | 4,342 | Sunk |
| 24 February 1917 | Miaoulis | Greece | 2,918 | Sunk |
| 26 February 1917 | Clan Farquhar | United Kingdom | 5,858 | Sunk |
| 27 February 1917 | Brodmore | United Kingdom | 4,071 | Sunk |
| 28 February 1917 | Shinsei Maru | Japan | 3,060 | Sunk |
| 26 March 1917 | Ledbury | United Kingdom | 3,046 | Sunk |
| 3 April 1917 | Vasilefs Constantinos | Greece | 4,070 | Sunk |
| 1 May 1917 | British Sun | United Kingdom | 5,565 | Sunk |
| 7 May 1917 | Repton | United Kingdom | 2,881 | Sunk |
| 26 May 1917 | Dorothy | Greece | 4,494 | Sunk |
| 10 June 1917 | HMS Grafton | Royal Navy | 7,350 | Damaged |
| - | - | Sunk: Damaged: Total: | 99,176 7,350 106,526 | - |


Question
When were the Elax and Welsh Prince attacked by UB-43?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Three days after sinking Elax, UB-43 sank another British ship, the Welsh Prince."]