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:
1989 Richmond (Yorks) by-election
Table title:
Results
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Candidate </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > ± </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Conservative </td><td colspan=1 rowspan=1 > William Hague </td><td colspan=1 rowspan=1 > 19,543 </td><td colspan=1 rowspan=1 > 37.2 </td><td colspan=1 rowspan=1 > 24.0 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > SDP </td><td class="highlighted"  colspan=1 rowspan=1 > Mike Potter </td><td class="highlighted"  colspan=1 rowspan=1 > 16,909 </td><td colspan=1 rowspan=1 > 32.2 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Social and Liberal Democrats </td><td class="highlighted"  colspan=1 rowspan=1 > Barbara Pearce </td><td class="highlighted"  colspan=1 rowspan=1 > 11,589 </td><td colspan=1 rowspan=1 > 22.1 </td><td colspan=1 rowspan=1 > −4.9 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Labour </td><td colspan=1 rowspan=1 > Frank Robson </td><td colspan=1 rowspan=1 > 2,591 </td><td colspan=1 rowspan=1 > 4.9 </td><td colspan=1 rowspan=1 > −6.9 </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Green </td><td colspan=1 rowspan=1 > Robert Upshall </td><td colspan=1 rowspan=1 > 1,473 </td><td colspan=1 rowspan=1 > 2.8 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Monster Raving Loony </td><td colspan=1 rowspan=1 > David "Lord" Sutch </td><td colspan=1 rowspan=1 > 167 </td><td colspan=1 rowspan=1 > 0.3 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Independent </td><td colspan=1 rowspan=1 > Anthony Millns1 </td><td colspan=1 rowspan=1 > 113 </td><td colspan=1 rowspan=1 > 0.2 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Corrective Party </td><td colspan=1 rowspan=1 > Lindi St. Claire </td><td colspan=1 rowspan=1 > 106 </td><td colspan=1 rowspan=1 > 0.2 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Liberal </td><td colspan=1 rowspan=1 > Nicholas Watkins </td><td colspan=1 rowspan=1 > 70 </td><td colspan=1 rowspan=1 > 0.1 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=3 rowspan=1 > Majority </th><td class="highlighted"  colspan=1 rowspan=1 > 2,634 </td><td colspan=1 rowspan=1 > 5.0 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=3 rowspan=1 > Turnout </th><td colspan=1 rowspan=1 > 52,561 </td><td colspan=1 rowspan=1 > 64.4 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=2 rowspan=1 > Conservative hold </td><th colspan=1 rowspan=1 > Swing </th><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Who finished second and third in the 1989 Richmond (Yorks) by-election, and how many votes did each receive?
Answer:
The SDP candidate Mike Potter finished second (with 16,909 votes, 2,634 behind Hague), while the Social and Liberal Democrats' Barbara Pearce came third with 11,589.