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:
1918 Wansbeck by-election
Table title:
Result
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 > Liberal </td><td class="highlighted"  colspan=1 rowspan=1 > Robert Mason </td><td colspan=1 rowspan=1 > 5,814 </td><td colspan=1 rowspan=1 > 52.5 </td><td colspan=1 rowspan=1 > n/a </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Labour </td><td class="highlighted"  colspan=1 rowspan=1 > Ebenezer Edwards </td><td colspan=1 rowspan=1 > 5,267 </td><td colspan=1 rowspan=1 > 47.5 </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 > 547 </td><td colspan=1 rowspan=1 > 5.0 </td><td colspan=1 rowspan=1 > n/a </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=2 rowspan=1 > Liberal hold </td><th colspan=1 rowspan=1 > Swing </th><td colspan=1 rowspan=1 > n/a </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
By what majority did Mason win the seat for the Liberal party in the 1918 Wansbeck by-election?
Answer:
In the 1918 Wansbeck by-election, Mason won the seat for the Liberal party with a majority of 547 votes over Edwards.