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:
1973 SANFL season
Table title:
Grand Final
Table:
<table id='hittask' contenteditable='False'>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><th class="highlighted"  colspan=3 rowspan=1 > 1973 SANFL Grand Final </th><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > Saturday, 29 September (2:10 pm) </td><td class="highlighted"  colspan=1 rowspan=1 > Glenelg </td><td class="highlighted"  colspan=1 rowspan=1 > def. </td><td class="highlighted"  colspan=1 rowspan=1 > North Adelaide </td><td colspan=1 rowspan=1 > Adelaide Oval (crowd: 56,525) </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 4.3 (27) 9.10 (64) 16.10 (106) 21.11 (137) </td><td colspan=1 rowspan=1 > Q1 Q2 Q3 Final </td><td class="highlighted"  colspan=1 rowspan=1 > 7.6 (48) 8.10 (58) 14.14 (98) 19.16 (130) </td><td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=2 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=6 rowspan=1 >  </td></tr>
</table>
Question:
How did Glenelg do at the 1973 SANFL grand final ?
Answer:
Glenelg narrowly won the 1973 SANFL Grand Final against North Adelaide, 21-11 (137) to 19-16 (130).