Complex sentence: In the 2013 federal elections, the party won 8.4% of the votes and 63 out of 630 seats in the Bundestag, making them the fourth biggest group and the smallest party with representation in the national parliament.
Split into simpler sentences: In the 2013 federal elections, the party won 8.4% of the votes and 63 out of 630 seats in the Bundestag. So that are the fourth biggest group and the smallest party with representation in the national parliament.