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:
Rondell Bartholomew
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 Grenada </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=7 > 2008 </td><td colspan=1 rowspan=4 > CARIFTA Games (U-20) </td><td colspan=1 rowspan=4 > Basseterre, Saint Kitts and Nevis </td><td colspan=1 rowspan=1 > 5th (sf) </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 21.61 (-1.1 m/s) </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 46.86 </td></tr>
<tr> <td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > 4x100 m relay </td><td colspan=1 rowspan=1 > 41.75 </td></tr>
<tr> <td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > 4x400 m relay </td><td colspan=1 rowspan=1 > 3:18.92 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > World Junior Championships </td><td colspan=1 rowspan=1 > Bydgoszcz, Poland </td><td class="highlighted"  colspan=1 rowspan=1 > 15th (sf) </td><td class="highlighted"  colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 47.60 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > Commonwealth Youth Games </td><td colspan=1 rowspan=2 > Pune, India </td><td colspan=1 rowspan=1 > 5th (h) </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 22.73 (0.2 m/s) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 6th </td><td class="highlighted"  colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 48.21 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2009 </td><td colspan=1 rowspan=2 > CARIFTA Games (U-20) </td><td colspan=1 rowspan=2 > Vieux Fort, Saint Lucia </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 45.58 </td></tr>
<tr> <td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 4x400 m relay </td><td colspan=1 rowspan=1 > 3:11.93 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Berlin, Germany </td><td colspan=1 rowspan=1 > 39th (h) </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 46.85 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Daegu, South Korea </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 45.45 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2016 </td><td colspan=1 rowspan=1 > OECS Track & Field Championships </td><td colspan=1 rowspan=1 > Tortola, British Virgin Islands </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 4x400m relay </td><td colspan=1 rowspan=1 > 3:09.74 </td></tr>
</table>
Question:
How did Rondell Bartholomew do at the  2008 World Junior Championships and the 2008 Commonwealth Youth Games?
Answer:
Rondell Bartholomew was a 400 m semi-finalist at the 2008 World Junior Championships in Athletics that July, then came sixth over the distance at the 2008 Commonwealth Youth Games.