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:
Sikkim (Lok Sabha constituency)
Table title:
Members of Parliament
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Election </th><th colspan=1 rowspan=1 > Member </th><th colspan=1 rowspan=1 > Party </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1977 </td><td colspan=1 rowspan=1 > Chhatra Bahadur Chhetri </td><td colspan=1 rowspan=1 > Indian National Congress </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1980 </td><td colspan=1 rowspan=1 > Pahal Man Subba </td><td colspan=1 rowspan=1 > Sikkim Janata Parishad </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Nar Bahadur Bhandari </td><td colspan=1 rowspan=1 > Independent </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > Dil Kumari Bhandari </td><td colspan=1 rowspan=1 > Sikkim Sangram Parishad </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1989 </td><td class="highlighted"  colspan=1 rowspan=1 > Nandu Thapa </td><td class="highlighted"  colspan=1 rowspan=1 > Sikkim Sangram Parishad </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1991 </td><td class="highlighted"  colspan=1 rowspan=1 > Dil Kumari Bhandari </td><td class="highlighted"  colspan=1 rowspan=1 > Sikkim Sangram Parishad </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1996 </td><td colspan=1 rowspan=1 > Bhim Prasad Dahal </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1998 </td><td colspan=1 rowspan=1 > Bhim Prasad Dahal </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1999 </td><td colspan=1 rowspan=1 > Bhim Prasad Dahal </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > Nakul Das Rai </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Prem Das Rai </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > Prem Das Rai </td><td colspan=1 rowspan=1 > Sikkim Democratic Front </td></tr>
</table>
Question:
Who and what party won the Sikkim (Lok Sabha constituency) elections in 1989 and 1991
Answer:
The 1989 and 1991 Sikkim (Lok Sabha constituency) elections were won by Sikkim Sangram Parishad candidates Nandu Thapa and Dil Kumari Bhandari.