Complex sentence: Pitkänen was arrested and repatriated to Finland, but Törni fell in love with a Swedish Finn, Marja Kops, and was soon engaged to be married.
Split into simpler sentences: Pitkänen was arrested and repatriated to Finland. Remaining in Sweden, Törni fell in love with a Swedish Finn, Marja Kops, and was soon engaged to be married.