Complex sentence: This lasted for only three years, after the liberation of the Netherlands in 1945, the "Summer time" was abolished for the duration of over thirty years and hence, the Netherlands was during that time forty minutes off the original Amsterdam Time.
Split into simpler sentences: This lasted for only three years, after the liberation of the Netherlands in 1945, the "Summer time" was abolished for over thirty years. Hence, the Netherlands was during that time forty minutes off the original Amsterdam Time.