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:
1955 Swiss federal election
Table title:
National Council
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Party </th><th colspan=1 rowspan=1 > Votes </th><th colspan=1 rowspan=1 > % </th><th colspan=1 rowspan=1 > Seats </th><th colspan=1 rowspan=1 > +/– </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Social Democratic Party </td><td colspan=1 rowspan=1 > 263,664 </td><td colspan=1 rowspan=1 > 27.0 </td><td class="highlighted"  colspan=1 rowspan=1 > 53 </td><td colspan=1 rowspan=1 > +4 </td></tr>
<tr> <td colspan=1 rowspan=1 > Free Democratic Party </td><td colspan=1 rowspan=1 > 227,370 </td><td colspan=1 rowspan=1 > 23.3 </td><td colspan=1 rowspan=1 > 50 </td><td colspan=1 rowspan=1 > –1 </td></tr>
<tr> <td colspan=1 rowspan=1 > Swiss Conservative People's Party </td><td colspan=1 rowspan=1 > 226,122 </td><td colspan=1 rowspan=1 > 23.2 </td><td colspan=1 rowspan=1 > 47 </td><td colspan=1 rowspan=1 > –1 </td></tr>
<tr> <td colspan=1 rowspan=1 > Party of Farmers, Traders and Independents </td><td colspan=1 rowspan=1 > 117,847 </td><td colspan=1 rowspan=1 > 12.1 </td><td colspan=1 rowspan=1 > 22 </td><td colspan=1 rowspan=1 > –1 </td></tr>
<tr> <td colspan=1 rowspan=1 > Ring of Independents </td><td colspan=1 rowspan=1 > 53,450 </td><td colspan=1 rowspan=1 > 5.5 </td><td colspan=1 rowspan=1 > 10 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Swiss Party of Labour </td><td colspan=1 rowspan=1 > 25,060 </td><td colspan=1 rowspan=1 > 2.6 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > –1 </td></tr>
<tr> <td colspan=1 rowspan=1 > Liberal Democratic Party </td><td colspan=1 rowspan=1 > 21,688 </td><td colspan=1 rowspan=1 > 2.2 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Social-Political Group </td><td colspan=1 rowspan=1 > 21,003 </td><td colspan=1 rowspan=1 > 2.2 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Evangelical People's Party </td><td colspan=1 rowspan=1 > 10,581 </td><td colspan=1 rowspan=1 > 1.1 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Liberal Socialist Party </td><td colspan=1 rowspan=1 > 3,471 </td><td colspan=1 rowspan=1 > 0.4 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Other parties </td><td colspan=1 rowspan=1 > 5,639 </td><td colspan=1 rowspan=1 > 0.6 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > Invalid/blank votes </td><td colspan=1 rowspan=1 > 22,986 </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=1 rowspan=1 > Total </td><td colspan=1 rowspan=1 > 998,881 </td><td colspan=1 rowspan=1 > 100 </td><td class="highlighted"  colspan=1 rowspan=1 > 196 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > Registered voters/turnout </td><td colspan=1 rowspan=1 > 1,425,421 </td><td colspan=1 rowspan=1 > 70.1 </td><td colspan=1 rowspan=1 > – </td><td colspan=1 rowspan=1 > – </td></tr>
<tr> <td colspan=5 rowspan=1 > Source: Nohlen & Stöver </td></tr>
</table>
Question:
Which party was the largest in the National Council after the 1955 Swiss federal election?
Answer:
The Social Democratic Party emerged as the largest party in the National Council, winning 53 seats.