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:
Hackney South and Shoreditch (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 colspan=1 rowspan=1 > Feb 1974 </td><td class="highlighted"  colspan=1 rowspan=2 > Ronald Brown </td><td colspan=1 rowspan=1 > Labour </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1981 </td><td class="highlighted"  colspan=1 rowspan=1 > SDP </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1983 </td><td class="highlighted"  colspan=1 rowspan=2 > Brian Sedgemore </td><td class="highlighted"  colspan=1 rowspan=1 > Labour </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > Liberal Democrat </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > Meg Hillier </td><td colspan=1 rowspan=1 > Labour Co-operative </td></tr>
</table>
Question:
Who defeated Brown as an SDP member in 1983 and which party was the consequent SDP member from?
Answer:
Brown held the seat as an SDP member until 1983, when he was defeated by the Labour Party candidate Brian Sedgemore.