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 county executives of St. Louis County, Missouri
Table title:
County Executives
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > # </th><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 > Party </th><th colspan=1 rowspan=1 > Terms </th></tr>
<tr> <td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > Luman F. Matthews </td><td colspan=1 rowspan=1 > 1951 </td><td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > 2 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > James H. J. McNary </td><td colspan=1 rowspan=1 > 1959 </td><td colspan=1 rowspan=1 > 1963 </td><td colspan=1 rowspan=1 > Democrat </td><td colspan=1 rowspan=1 > 1 </td></tr>
<tr> <td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Lawrence K. Roos </td><td colspan=1 rowspan=1 > 1963 </td><td colspan=1 rowspan=1 > 1975 </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > 3 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > Gene McNary </td><td colspan=1 rowspan=1 > 1975 </td><td colspan=1 rowspan=1 > October 25, 1989 </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > 3½ </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 </td><td class="highlighted"  colspan=1 rowspan=1 > H. C. Milford </td><td class="highlighted"  colspan=1 rowspan=1 > October 25, 1989 </td><td colspan=1 rowspan=1 > January 1, 1991 </td><td colspan=1 rowspan=1 > Republican </td><td colspan=1 rowspan=1 > ½ </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > Buzz Westfall </td><td colspan=1 rowspan=1 > January 1, 1991 </td><td colspan=1 rowspan=1 > October 14, 2003 </td><td colspan=1 rowspan=1 > Democrat </td><td colspan=1 rowspan=1 > 3½ </td></tr>
<tr> <td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > Charlie Dooley </td><td colspan=1 rowspan=1 > October 14, 2003 </td><td colspan=1 rowspan=1 > January 1, 2015 </td><td colspan=1 rowspan=1 > Democrat </td><td colspan=1 rowspan=1 > 2½ </td></tr>
<tr> <td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > Steve Stenger </td><td colspan=1 rowspan=1 > January 1, 2015 </td><td colspan=1 rowspan=1 > April 29, 2019 </td><td colspan=1 rowspan=1 > Democrat </td><td colspan=1 rowspan=1 > 1½ </td></tr>
<tr> <td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > Sam Page </td><td colspan=1 rowspan=1 > April 29, 2019 </td><td colspan=1 rowspan=1 > Present </td><td colspan=1 rowspan=1 > Democrat </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
When was Milford the St. Louis County Executive?
Answer:
Milford became St. Louis County Executive on October 25, 1989 and left office on January 1, 1991.