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:
Meirionnydd Nant Conwy (UK Parliament 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 class="highlighted"  colspan=1 rowspan=1 > 1983 </td><td class="highlighted"  colspan=1 rowspan=1 > Dafydd Elis Thomas </td><td class="highlighted"  colspan=1 rowspan=1 > Plaid Cymru </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > Elfyn Llwyd </td><td colspan=1 rowspan=1 > Plaid Cymru </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2010 </td><td colspan=2 rowspan=1 > constituency abolished: see Aberconwy and Dwyfor Meirionnydd </td></tr>
</table>
Question:
When was Meirionnydd Nant Conwy represented by Dafydd Elis Thomas?
Answer:
From 1983 to 1992, Meirionnydd Nant Conwy was represented by Dafydd Elis Thomas.