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:
Alexandros Papamichail
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 class="highlighted"  colspan=6 rowspan=1 > Representing Greece </th></tr>
<tr> <td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > World Race Walking Cup (U20) </td><td colspan=1 rowspan=1 > Naumburg, Germany </td><td colspan=1 rowspan=1 > 39th </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 46:53 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > European Race Walking Cup (U20) </td><td colspan=1 rowspan=1 > Miskolc, Hungary </td><td colspan=1 rowspan=1 > 21st </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 45:29 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2006 </td><td colspan=1 rowspan=1 > World Race Walking Cup (U20) </td><td colspan=1 rowspan=1 > A Coruña, Spain </td><td colspan=1 rowspan=1 > 10th </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 43:31 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Junior Championships </td><td colspan=1 rowspan=1 > Beijing, China </td><td colspan=1 rowspan=1 > 9th </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 44:36.15 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2007 </td><td colspan=1 rowspan=1 > European Race Walking Cup (U20) </td><td colspan=1 rowspan=1 > Royal Leamington Spa, United Kingdom </td><td colspan=1 rowspan=1 > 13th </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 43:21 </td></tr>
<tr> <td colspan=1 rowspan=1 > European Junior Championships </td><td colspan=1 rowspan=1 > Hengelo, Netherlands </td><td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > 10 km walk </td><td colspan=1 rowspan=1 > 42:04.57 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2009 </td><td colspan=1 rowspan=1 > European Race Walking Cup </td><td colspan=1 rowspan=1 > Metz, France </td><td colspan=1 rowspan=1 > 22nd </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:33:31 </td></tr>
<tr> <td colspan=1 rowspan=1 > Mediterranean Games </td><td colspan=1 rowspan=1 > Pescara, Italy </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:28:04 </td></tr>
<tr> <td colspan=1 rowspan=1 > European U23 Championships </td><td colspan=1 rowspan=1 > Kaunas, Lithuania </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:25:06 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2012 </td><td class="highlighted"  colspan=1 rowspan=2 > Olympic Games </td><td colspan=1 rowspan=2 > London, United Kingdom </td><td class="highlighted"  colspan=1 rowspan=1 > 15th </td><td class="highlighted"  colspan=1 rowspan=1 > 20 km walk </td><td class="highlighted"  colspan=1 rowspan=1 > 1:21:12 NR </td></tr>
<tr> <td colspan=1 rowspan=1 > 22nd </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > 3:49:56 NR </td></tr>
<tr> <td colspan=1 rowspan=2 > 2013 </td><td colspan=1 rowspan=1 > European Race Walking Cup </td><td colspan=1 rowspan=1 > Dudince, Slovakia </td><td colspan=1 rowspan=1 > 10th </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > 3:51:05 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Moscow, Russia </td><td colspan=1 rowspan=1 > 16th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:23:48 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2014 </td><td colspan=1 rowspan=2 > European Championships </td><td colspan=1 rowspan=2 > Zürich, Switzerland </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=1 > 13th </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > 3:49:58 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2015 </td><td colspan=1 rowspan=1 > European Race Walking Cup </td><td colspan=1 rowspan=1 > Murcia, Spain </td><td colspan=1 rowspan=1 > 7th </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > 3:51:38 </td></tr>
<tr> <td colspan=1 rowspan=2 > World Championships </td><td colspan=1 rowspan=2 > Beijing, China </td><td colspan=1 rowspan=1 > 25th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:24:11 </td></tr>
<tr> <td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=2 > 2016 </td><td colspan=1 rowspan=2 > Olympic Games </td><td colspan=1 rowspan=2 > Rio de Janeiro, Brazil </td><td colspan=1 rowspan=1 > 20th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:21:55 </td></tr>
<tr> <td colspan=1 rowspan=1 > 27th </td><td colspan=1 rowspan=1 > 50 km walk </td><td colspan=1 rowspan=1 > 3:59:21 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Berlin, Germany </td><td colspan=1 rowspan=1 > 15th </td><td colspan=1 rowspan=1 > 20 km walk </td><td colspan=1 rowspan=1 > 1:22.51 </td></tr>
</table>
Question:
Which event did Alexandros Papamichail compete in to achieve a Greek national record at the 2012 Olympics and what was his finishing position and time?
Answer:
Alexandros Papamichail competed in the 20 km walk at the 2012 Olympics, where he placed 15th with a time of 1:21:12, a Greek national record.