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:
Swimming at the 2008 Summer Olympics – Men's 50 metre freestyle
Table title:
Records
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Time </th><th colspan=1 rowspan=1 > Record </th></tr>
<tr> <td colspan=1 rowspan=1 > 14 August </td><td colspan=1 rowspan=1 > Heat 11 </td><td colspan=1 rowspan=1 > César Cielo </td><td colspan=1 rowspan=1 > Brazil </td><td colspan=1 rowspan=1 > 21.47 </td><td colspan=1 rowspan=1 > OR </td></tr>
<tr> <td colspan=1 rowspan=1 > 14 August </td><td colspan=1 rowspan=1 > Heat 12 </td><td class="highlighted"  colspan=1 rowspan=1 > Amaury Leveaux </td><td colspan=1 rowspan=1 > France </td><td class="highlighted"  colspan=1 rowspan=1 > 21.46 </td><td colspan=1 rowspan=1 > OR </td></tr>
<tr> <td colspan=1 rowspan=1 > 15 August </td><td class="highlighted"  colspan=1 rowspan=1 > Semifinal 2 </td><td class="highlighted"  colspan=1 rowspan=1 > César Cielo </td><td colspan=1 rowspan=1 > Brazil </td><td class="highlighted"  colspan=1 rowspan=1 > 21.34 </td><td class="highlighted"  colspan=1 rowspan=1 > OR </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 August </td><td colspan=1 rowspan=1 > Final </td><td colspan=1 rowspan=1 > César Cielo </td><td colspan=1 rowspan=1 > Brazil </td><td colspan=1 rowspan=1 > 21.30 </td><td colspan=1 rowspan=1 > OR </td></tr>
</table>
Question:
Did César Cielo set any records in the Men's 50 metre freestyle at the 2008 Summer Olympics?
Answer:
In the semifinals, Cielo lowered an Olympic record to 21.34 that had been set by Leveaux under 0.12 seconds.