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:
County Louth (UK Parliament constituency)
Table title:
Elections in the 1910s
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 class="highlighted"  colspan=1 rowspan=1 > Sinn Féin </td><td colspan=1 rowspan=1 > John J. O'Kelly </td><td colspan=1 rowspan=1 > 10,770 </td><td colspan=1 rowspan=1 > 50.6 </td><td colspan=1 rowspan=1 > N/A </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Irish Parliamentary </td><td colspan=1 rowspan=1 > Richard Hazleton </td><td colspan=1 rowspan=1 > 10,515 </td><td colspan=1 rowspan=1 > 49.4 </td><td colspan=1 rowspan=1 > N/A </td></tr>
<tr> <th colspan=3 rowspan=1 > Majority </th><td class="highlighted"  colspan=1 rowspan=1 > 255 </td><td colspan=1 rowspan=1 > 1.2 </td><td colspan=1 rowspan=1 > N/A </td></tr>
<tr> <th colspan=3 rowspan=1 > Turnout </th><td colspan=1 rowspan=1 > 21,285 </td><td colspan=1 rowspan=1 > 73.0 </td><td colspan=1 rowspan=1 > N/A </td></tr>
<tr> <th colspan=3 rowspan=1 > Registered electors </th><td colspan=1 rowspan=1 > 29,176 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=5 rowspan=1 > Sinn Féin win (new seat) </td></tr>
</table>
Question:
How many votes did Sinn Féin win by at the County Louth (UK Parliament constituency) election?
Answer:
Sinn Féin won by 255 votes in the County Louth (UK Parliament constituency) election.