Complex sentence: Sant has announced that he will be standing as a Labour Party candidate in the 2014 European Parliament election, even though some years back he tried to convince the nation that it was not in the country's interest to join the European Union.
Split into simpler sentences: Sant has announced that he will be standing as a Labour Party candidate in the 2014 European Parliament election. Even though some years back he tried to convince the nation that it was not in the country's interest to join the European Union.