Complex sentence: Köln subsequently won the competition in 1978 and 1981 and were runners-up in 1981, making them the only team, other than the hosts, to win the competition more than once.
Split into simpler sentences: Köln subsequently won the competition in 1978 and 1981 and were runners-up in 1981. They are the only team other than the hosts to win the competition more than once.