Complex sentence: In 1945, the Vainios moved into a detached house in Metsola where they lived until 1950 before moving again to Kotkansaari, in the centre of Kotka.
Split into simpler sentences: In 1945, the Vainios moved into a detached house in Metsola. They lived there until 1950, after which they moved to Kotkansaari, in the centre of Kotka.