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:
Doina Melinte
Table title:
International competitions
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 Romania </th></tr>
<tr> <td colspan=1 rowspan=1 > 1980 </td><td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Moscow, Soviet Union </td><td colspan=1 rowspan=1 > 13th (sf) </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:00.8 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > Universiade </td><td colspan=1 rowspan=1 > Bucharest, Romania </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:57.81 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1982 </td><td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Athens, Greece </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:59.65 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1983 </td><td colspan=1 rowspan=2 > World Championships </td><td colspan=1 rowspan=2 > Helsinki, Finland </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:00.13 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:04.42 </td></tr>
<tr> <td colspan=1 rowspan=3 > 1984 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Gothenburg, Sweden </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:59.81 </td></tr>
<tr> <td colspan=1 rowspan=2 > Olympic Games </td><td colspan=1 rowspan=2 > Los Angeles, United States </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:57.60 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:03.76 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Piraeus, Greece </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:02.54 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1986 </td><td colspan=1 rowspan=2 > European Championships </td><td colspan=1 rowspan=2 > Stuttgart, Germany </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:02.44 </td></tr>
<tr> <td colspan=1 rowspan=1 > DNF (heats) </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > — </td></tr>
<tr> <td colspan=1 rowspan=2 > 1987 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Indianapolis, United States </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:05.68 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Rome, Italy </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:59.27 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1988 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Budapest, Hungary </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:05.77 </td></tr>
<tr> <td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Seoul, South Korea </td><td colspan=1 rowspan=1 > 9th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:02.89 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1989 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Budapest, Hungary </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:04.79 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Cup </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:56.65 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1990 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Glasgow, United Kingdom </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:09.73 </td></tr>
<tr> <td colspan=1 rowspan=1 > European Championships </td><td colspan=1 rowspan=1 > Split, Yugoslavia </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:10.91 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 1991 </td><td class="highlighted"  colspan=1 rowspan=1 > World Indoor Championships </td><td class="highlighted"  colspan=1 rowspan=1 > Seville, Spain </td><td class="highlighted"  colspan=1 rowspan=1 > 4th </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:06.65 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > World Championshipas </td><td class="highlighted"  colspan=1 rowspan=1 > Tokyo, Japan </td><td class="highlighted"  colspan=1 rowspan=1 > 4th </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:03.19 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1992 </td><td colspan=1 rowspan=1 > European Indoor Championships </td><td colspan=1 rowspan=1 > Genoa, Italy </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:06.90 </td></tr>
<tr> <td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > DNF (final) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:04.42 (semifinals) </td></tr>
<tr> <th colspan=6 rowspan=1 > (sf) indicates overall position in semifinal round (dnf) = did not finish </th></tr>
</table>
Question:
How did Diona Melinte perform at the 1500 m in the World Indoor Championships in Seville and the World Championships in Tokyo?
Answer:
In 1991, Doina Melinte was fourth in the 1500 m at both the World Indoor Championships in Seville and the World Championships in Tokyo.