user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Events list' regarding '2010 in Jewels'
Table Content:
| # | Event Title | Date | Arena | Location | Attendance |
| --- | --- | --- | --- | --- | --- |
| 13 | Jewels 11th Ring | December 17, 2010 | Korakuen Hall | Tokyo, Japan | 1216 |
| 12 | Jewels 10th Ring | October 10, 2010 | Shin-Kiba 1st Ring | Tokyo, Japan | 464 |
| 11 | Jewels 9th Ring | July 31, 2010 | Shinjuku Face | Tokyo, Japan | 578 |
| 10 | Jewels 8th Ring | May 23, 2010 | Shin-Kiba 1st Ring | Tokyo, Japan | 438 |
| 9 | Jewels 7th Ring | March 19, 2010 | Shinjuku Face | Tokyo, Japan | 696 |
| 8 | Jewels - Rough Stone: Second Ring | January 31, 2010 | Caesar Gym Shin-Koiwa | Tokyo, Japan | - |


Question
What events were hosted at the Caesar Gym Shin-Koiwa and when were they held?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Jewels - Rough Stone: Second Ring was an event held on January 31, 2010, at the Caesar Gym Shin-Koiwa in Tokyo, Japan."]