sentences:  On 10 May 1940 Nazi Germany invaded the Netherlands and the government fled to London to escape the German occupation.During the German occupation Den Uyl continued his study and graduated with an Master of Economics degree in April 1942.Den Uyl was sympathetic with the Dutch resistance against the German occupiers and worked as a journalist and editor for the underground newspapers "Het Parool" and "Free Netherlands" from April 1942 until January 1949.