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:
Grete Kirkeberg
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 Norway </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1986 </td><td class="highlighted"  colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Stuttgart, West Germany </td><td class="highlighted"  colspan=1 rowspan=1 > 21st </td><td class="highlighted"  colspan=1 rowspan=1 > 10,000 m </td><td colspan=1 rowspan=1 > 33:06.87 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > Frankfurt Marathon </td><td colspan=1 rowspan=1 > Frankfurt, West Germany </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:35:44 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1993 </td><td colspan=1 rowspan=1 > Stockholm Marathon </td><td colspan=1 rowspan=1 > Stockholm, Sweden </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:37:58 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > Stockholm Marathon </td><td colspan=1 rowspan=1 > Stockholm, Sweden </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:36:40 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1997 </td><td class="highlighted"  colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Athens, Greece </td><td class="highlighted"  colspan=1 rowspan=1 > 16th </td><td class="highlighted"  colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:41:05 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1998 </td><td colspan=1 rowspan=1 > Stockholm Marathon </td><td colspan=1 rowspan=1 > Stockholm, Sweden </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > 2:37:39 </td></tr>
<tr> <td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Budapest, Hungary </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > Marathon </td><td colspan=1 rowspan=1 > DNF </td></tr>
</table>
Question:
What places did Grete Kirkeberg finish in the 1986 European Championships and the 1997 World Championships?
Answer:
Grete Kirkeberg finished 21st in 10,000 meters at the 1986 European Championships, and sixteenth in the marathon at the 1997 World Championships.