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:
Kateřina Cachová
Table title:
Achievements
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=6 rowspan=1 > Representing the Czech Republic </th></tr>
<tr> <td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > World Youth Championships </td><td colspan=1 rowspan=1 > Marrakech, Morocco </td><td colspan=1 rowspan=1 > 11th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5148 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > World Junior Championships </td><td colspan=1 rowspan=1 > Beijing, China </td><td colspan=1 rowspan=1 > 15th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5170 pts </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > World Youth Championships </td><td colspan=1 rowspan=1 > Ostrava, Czech Republic </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5641, WYL </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > European Junior Championships </td><td colspan=1 rowspan=1 > Novi Sad, Serbia </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5660, SB </td></tr>
<tr> <td colspan=1 rowspan=2 > 2010 </td><td colspan=1 rowspan=1 > European Cup Combined Events – Super League </td><td colspan=1 rowspan=1 > Tallinn, Estonia </td><td colspan=1 rowspan=1 > 7th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5908 </td></tr>
<tr> <td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > 17th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5911 pts, PB </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > 2011 </td><td colspan=1 rowspan=1 > TNT – Fortuna Meeting </td><td colspan=1 rowspan=1 > Kladno, Czech Republic </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5897 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > European U23 Championships </td><td class="highlighted"  colspan=1 rowspan=1 > Ostrava, Czech Republic </td><td class="highlighted"  colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > Heptathlon </td><td class="highlighted"  colspan=1 rowspan=1 > 6123 pts, PB </td></tr>
<tr> <td colspan=1 rowspan=1 > Summer Universiade </td><td colspan=1 rowspan=1 > Shenzhen, China </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5873 pts </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Daegu, South Korea </td><td colspan=1 rowspan=1 > 21st </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 5908 pts </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > TNT – Fortuna Meeting </td><td colspan=1 rowspan=1 > Kladno, Czech Republic </td><td colspan=1 rowspan=1 > N/A </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 15th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 6070 pts </td></tr>
<tr> <td colspan=1 rowspan=2 > 2018 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Birmingham, United Kingdom </td><td colspan=1 rowspan=1 > 11th </td><td colspan=1 rowspan=1 > Pentathlon </td><td colspan=1 rowspan=1 > 4282 pts </td></tr>
<tr> <td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Berlin, Germany </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > Heptathlon </td><td colspan=1 rowspan=1 > 6400 pts </td></tr>
</table>
Question:
What were the stats for Cachová for which he won the silver medal in the European U23 Championships?
Answer:
Cachová won the silver medal with a personal best of 6123 points at the 2011 European U23 Championships in Ostrava.