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:
List of Speakers of the House of Representatives of Yemen
Table title:

Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Took office </th><th colspan=1 rowspan=1 > Left office </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Dr. Yasin Said Numan </td><td colspan=1 rowspan=1 > 1990 </td><td class="highlighted"  colspan=1 rowspan=1 > 1993 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Sheikh Abdullah ibn Husayn al-Ahmar </td><td colspan=1 rowspan=1 > 15 June 1993 </td><td colspan=1 rowspan=1 > 29 December 2007 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Yahya Ali al-Raee </td><td colspan=1 rowspan=1 > 11 February 2008 </td><td colspan=1 rowspan=1 > Incumbent </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Who was Speakers of the House of Representatives of Yemen until 1993, and who replaced him?
Answer:
In Yemen, Numan was the Speaker of Parliament, until the election of 1993 when he was replaced by Abdullah ibn Husayn al-Ahmar.