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:
Sarah Rowell
Table title:
Achievements
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=6 rowspan=1 > Representing Great Britain / England </th></tr>
<tr> <td colspan=1 rowspan=1 > 1982 </td><td colspan=1 rowspan=1 > London Marathon </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 23rd </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:54:29 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > 1983 </td><td colspan=1 rowspan=1 > Reading Half Marathon </td><td colspan=1 rowspan=1 > Reading, United Kingdom </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Half marathon </td><td colspan=1 rowspan=1 > 1:16:00 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > London Marathon </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 9th </td><td colspan=1 rowspan=1 > Marathon </td><td class="highlighted"  colspan=1 rowspan=1 > 2:39:11 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Student Games (Universiade) </td><td colspan=1 rowspan=1 > Edmonton, Canada </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:47:37 </td></tr>
<tr> <td colspan=1 rowspan=1 > New York City Marathon </td><td colspan=1 rowspan=1 > New York City, United States </td><td colspan=1 rowspan=1 > 14th </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:40:52 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1984 </td><td colspan=1 rowspan=1 > London Marathon </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:31:28 </td></tr>
<tr> <td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Los Angeles, United States </td><td colspan=1 rowspan=1 > 14th </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:34:08 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1985 </td><td colspan=1 rowspan=1 > London Marathon </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:28:06 </td></tr>
<tr> <td colspan=1 rowspan=1 > Columbus Marathon </td><td colspan=1 rowspan=1 > Columbus, Ohio, United States </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:36:39 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > World Mountain Running Trophy </td><td colspan=1 rowspan=1 > Telfes, Austria </td><td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > Fell Running </td><td colspan=1 rowspan=1 > 38:15 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > World Mountain Running Trophy </td><td colspan=1 rowspan=1 > Susa Valley, Italy </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > Fell running </td><td colspan=1 rowspan=1 > 40:37 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1993 </td><td colspan=1 rowspan=1 > World Mountain Running Trophy </td><td colspan=1 rowspan=1 > Gap, Hautes-Alpes </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > Fell Running </td><td colspan=1 rowspan=1 > 38:32 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1995 </td><td colspan=1 rowspan=1 > World Mountain Running Trophy </td><td colspan=1 rowspan=1 > Edinburgh, United Kingdom </td><td colspan=1 rowspan=1 > 12th </td><td colspan=1 rowspan=1 > Fell Running </td><td colspan=1 rowspan=1 > 40:06 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > European Mountain Running Trophy </td><td colspan=1 rowspan=1 > Llanberis, United Kingdom </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > Fell Running </td><td colspan=1 rowspan=1 > 54:36 </td></tr>
</table>
Question:
How did Sarah Rowell perform at the 1983 London Marathon?
Answer:
Sarah Rowell ran 2:39:11 at the 1983 London Marathon.