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 foreign ministers of Austria-Hungary
Table title:
Ministers of the Imperial and Royal House and of Foreign Affairs of Austria-Hungary (1867–1918)
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Portrait </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Began </th><th colspan=1 rowspan=1 > Ended </th></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Friedrich Ferdinand von Beust (13 January 1809 – 24 October 1886) </td><td colspan=1 rowspan=1 > 30 December 1867 </td><td colspan=1 rowspan=1 > 8 November 1871 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Gyula Andrássy de Csíkszentkirály et Krasznahorka (8 March 1823 – 18 February 1890) </td><td colspan=1 rowspan=1 > 14 November 1871 </td><td colspan=1 rowspan=1 > 8 October 1879 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Baron Heinrich Karl von Haymerle (7 December 1828 – 10 October 1881) </td><td colspan=1 rowspan=1 > 8 October 1879 </td><td colspan=1 rowspan=1 > 10 October 1881 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Gustav Kálnoky de Köröspatak (29 December 1832 – 13 February 1898) </td><td colspan=1 rowspan=1 > 20 November 1881 </td><td colspan=1 rowspan=1 > 2 May 1895 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Agenor Maria Gołuchowski (25 March 1849 – 28 March 1921) </td><td colspan=1 rowspan=1 > 16 May 1895 </td><td colspan=1 rowspan=1 > 24 October 1906 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Alois Lexa von Aehrenthal (27 September 1854 – 17 February 1912) </td><td colspan=1 rowspan=1 > 24 October 1906 </td><td colspan=1 rowspan=1 > 17 February 1912 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Leopold Berchtold von und zu Ungarschitz, Frättling und Püllütz (18 April 1863 – 21 November 1942) </td><td colspan=1 rowspan=1 > 17 February 1912 </td><td colspan=1 rowspan=1 > 13 January 1915 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Count Stephan Burián von Rajecz (16 January 1851 – 20 October 1922) </td><td colspan=1 rowspan=1 > 13 January 1915 </td><td colspan=1 rowspan=1 > 22 December 1916 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Ottokar Czernin von und zu Chudenitz (26 September 1872 – 4 April 1932) </td><td colspan=1 rowspan=1 > 22 December 1916 </td><td colspan=1 rowspan=1 > 16 April 1918 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Count Stephan Burián von Rajecz (16 January 1851 – 20 October 1922) </td><td colspan=1 rowspan=1 > 16 April 1918 </td><td colspan=1 rowspan=1 > 24 October 1918 </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > Count Gyula Andrássy de Csíkszentkirály et Krasznahorka (the Younger) (30 June 1860 – 11 June 1929) </td><td colspan=1 rowspan=1 > 24 October 1918 </td><td colspan=1 rowspan=1 > 2 November 1918 </td></tr>
</table>
Question:
Who served as Imperial Foreign Minister of Austria-Hungary from 1851-1922?
Answer:
Stephan Burián von Rajecz served as Imperial Foreign Minister of Austria-Hungary from 1851-1922.