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:
Ontronik Khachaturian
Table title:
Bands
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Band </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Start date </th><th colspan=1 rowspan=1 > End date </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > System of a Down </td><td class="highlighted"  colspan=1 rowspan=1 > Co-founder/Drums </td><td class="highlighted"  colspan=1 rowspan=1 > 1993 </td><td class="highlighted"  colspan=1 rowspan=1 > 1997 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > The Apex Theory </td><td class="highlighted"  colspan=1 rowspan=1 > Founder/Vocalist </td><td class="highlighted"  colspan=1 rowspan=1 > 1999 </td><td class="highlighted"  colspan=1 rowspan=1 > November 2002 </td></tr>
</table>
Question:
What did Ontronik Khachaturian do after leaving System of a Down?
Answer:
After leaving System of a Down, Ontronik Khachaturian founded The Apex Theory in 1999.