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:
Niusha Mancilla
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 Bolivia </th></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > South American Youth Championships </td><td colspan=1 rowspan=1 > Tarija, Bolivia </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:24.8 min A </td></tr>
<tr> <td colspan=1 rowspan=4 > 1986 </td><td colspan=1 rowspan=2 > World Junior Championships </td><td colspan=1 rowspan=2 > Athens, Greece </td><td colspan=1 rowspan=1 > 38th (h) </td><td colspan=1 rowspan=1 > 800m </td><td colspan=1 rowspan=1 > 2:21.10 </td></tr>
<tr> <td colspan=1 rowspan=1 > 21st (h) </td><td colspan=1 rowspan=1 > 400m hurdles </td><td colspan=1 rowspan=1 > 66.88 </td></tr>
<tr> <td colspan=1 rowspan=2 > South American Youth Championships </td><td colspan=1 rowspan=2 > Comodoro Rivadavia, Argentina </td><td colspan=1 rowspan=1 > 7th </td><td colspan=1 rowspan=1 > 400 m </td><td colspan=1 rowspan=1 > 60.37 s </td></tr>
<tr> <td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:19.18 min </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=3 > 1997 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Paris, France </td><td colspan=1 rowspan=1 > 17th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:28.70 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > South American Championships </td><td colspan=1 rowspan=1 > Mar del Plata, Argentina </td><td class="highlighted"  colspan=1 rowspan=1 > 2nd </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:34.90 </td></tr>
<tr> <td colspan=1 rowspan=1 > Bolivarian Games </td><td colspan=1 rowspan=1 > Arequipa, Perú </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:33.3 A </td></tr>
<tr> <td colspan=1 rowspan=3 > 1999 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Maebashi, Japan </td><td colspan=1 rowspan=1 > 14th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:20.16 </td></tr>
<tr> <td colspan=1 rowspan=2 > Pan American Games </td><td colspan=1 rowspan=2 > Winnipeg, Canada </td><td colspan=1 rowspan=1 > 12th (h) </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:09.91 </td></tr>
<tr> <td colspan=1 rowspan=1 > 9th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:26.71 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2000 </td><td colspan=1 rowspan=1 > Ibero-American Championships </td><td colspan=1 rowspan=1 > Rio de Janeiro, Brazil </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:20.02 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2001 </td><td colspan=1 rowspan=3 > Bolivarian Games </td><td colspan=1 rowspan=3 > Ambato, Ecuador </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:03.98 A </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:22.6 A </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 3000 m s'chase </td><td colspan=1 rowspan=1 > 10:40.7 A </td></tr>
<tr> <td colspan=1 rowspan=2 > 2002 </td><td colspan=1 rowspan=2 > Ibero-American Championships </td><td colspan=1 rowspan=2 > Guatemala City, Guatemala </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:08.53 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:25.25 </td></tr>
<tr> <td colspan=1 rowspan=3 > 2003 </td><td colspan=1 rowspan=2 > South American Championships </td><td colspan=1 rowspan=2 > Barquisimeto, Venezuela </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 2:07.63 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:21.54 </td></tr>
<tr> <td colspan=1 rowspan=1 > Pan American Games </td><td colspan=1 rowspan=1 > Santo Domingo, Dominican Republic </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=3 > 2004 </td><td colspan=1 rowspan=1 > World Indoor Championships </td><td colspan=1 rowspan=1 > Budapest, Hungary </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=2 > Ibero-American Championships </td><td colspan=1 rowspan=2 > Huelva, Spain </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:21.52 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 9.28.70 </td></tr>
</table>
Question:
What did Niusha Mancilla achieve in the 1997 South American Championships?
Answer:
Niusha Mancilla claimed a silver over 1500 m at the 1997 South American Championships.