Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
2010 in Jewels
Table title:
Events list
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > # </th><th colspan=1 rowspan=1 > Event Title </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Arena </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Attendance </th></tr>
<tr> <td colspan=1 rowspan=1 > 13 </td><td colspan=1 rowspan=1 > Jewels 11th Ring </td><td colspan=1 rowspan=1 > December 17, 2010 </td><td colspan=1 rowspan=1 > Korakuen Hall </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 1216 </td></tr>
<tr> <td colspan=1 rowspan=1 > 12 </td><td colspan=1 rowspan=1 > Jewels 10th Ring </td><td colspan=1 rowspan=1 > October 10, 2010 </td><td colspan=1 rowspan=1 > Shin-Kiba 1st Ring </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 464 </td></tr>
<tr> <td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > Jewels 9th Ring </td><td colspan=1 rowspan=1 > July 31, 2010 </td><td colspan=1 rowspan=1 > Shinjuku Face </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 578 </td></tr>
<tr> <td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > Jewels 8th Ring </td><td colspan=1 rowspan=1 > May 23, 2010 </td><td colspan=1 rowspan=1 > Shin-Kiba 1st Ring </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 438 </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > Jewels 7th Ring </td><td colspan=1 rowspan=1 > March 19, 2010 </td><td colspan=1 rowspan=1 > Shinjuku Face </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 696 </td></tr>
<tr> <td colspan=1 rowspan=1 > 8 </td><td class="highlighted"  colspan=1 rowspan=1 > Jewels - Rough Stone: Second Ring </td><td class="highlighted"  colspan=1 rowspan=1 > January 31, 2010 </td><td class="highlighted"  colspan=1 rowspan=1 > Caesar Gym Shin-Koiwa </td><td class="highlighted"  colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What events were hosted at the Caesar Gym Shin-Koiwa and when were they held?
Answer:
Jewels - Rough Stone: Second Ring was an event held on January 31, 2010, at the Caesar Gym Shin-Koiwa in Tokyo, Japan.