user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Ships attacked' regarding 'German submarine U-9 (1935)'
Table Content:
| Date | Name | Nationality | Tonnage | Fate |
| --- | --- | --- | --- | --- |
| 18 January 1940 | Flandria | Sweden | 1,179 | Sunk |
| 19 January 1940 | Patria | Sweden | 1,188 | Sunk |
| 11 February 1940 | Linda | Estonia | 1,213 | Sunk |
| 20 April 1940 | ORP Błyskawica | Polish Navy | 1,975 | torpedo misfired, ship survived |
| 4 May 1940 | San Tiburcio | United Kingdom | 5,995 | Sunk (mine) |
| 9 May 1940 | Doris | French Navy | 552 | Sunk |
| 11 May 1940 | Tringa | United Kingdom | 1,930 | Sunk |
| 11 May 1940 | Viiu | Estonia | 1,908 | Sunk |
| 23 May 1940 | Sigurd Faulbaum | Belgium | 3,256 | Sunk |
| 11 May 1944 | Shtorm | Soviet Union | 412 | Damaged |


Question
How many total tons has U-9 sunk or damaged?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["U-9 sank eight ships totalling 17,221 gross register tons (GRT) and damaging 412 tons."]