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:
Carsten Schlangen
Table title:
Competition record
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 Germany </th></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Gothenburg, Sweden </td><td colspan=1 rowspan=1 > 10th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:42.62 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2008 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Valencia, Spain </td><td colspan=1 rowspan=1 > 10th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:41.54 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Beijing, China </td><td class="highlighted"  colspan=1 rowspan=1 > 14th (sf) </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:37.94 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2009 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Turin, Italy </td><td colspan=1 rowspan=1 > 12th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:43.45 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Berlin, Germany </td><td colspan=1 rowspan=1 > 30th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:44.00 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:43.52 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Paris, France </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:41.55 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2012 </td><td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Helsinki, Finland </td><td colspan=1 rowspan=1 > 17th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:46.52 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 11th (sf) </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:38.23 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2013 </td><td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Moscow, Russia </td><td colspan=1 rowspan=1 > 22nd (sf) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:44.44 </td></tr>
</table>
Question:
In which event did Carsten Schlangen reach the semi finals in 2008 and 2012 Olympic Games?
Answer:
Carsten Schlangen made it to the semi finals of the 1500 m at the 2008 and 2012 Olympic Games.