Detailed Instructions: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.
Q: Question: In what country did De Koning attend a gymnasium? Passage:De Koning attended a Gymnasium in Meppel from April 1939 until September 1943. On 10 May 1940 Nazi Germany invaded the Netherlands and the government fled to London to escape the German occupation. During the German occupation De Koning continued his study but in September 1943 he joined the Dutch resistance against the German occupiers barely 17-years old. Following the end of World War II De Koning volunteered and enlisted in the Royal Netherlands East Indies Army as a Corporal serving in the Dutch East Indies from August 1945 until June 1948. De Koning applied at the Utrecht University in June 1948 majoring in Social geography and obtaining an Bachelor of Social Science degree in July 1950 and worked as a student researcher before graduating with an Master of Social Science degree in July 1958. De Koning worked as a trade association executive for the (CBTB) from February 1955 until November 1961 and worked as a researcher at the Royal Academy of Arts and Sciences from November 1961 until January 1964. De Koning worked again as a trade association executive for the Christian Farmers and Gardeners association serving as General-Secretary of the Executive Board from January 1964 until May 1971.

A:
De Koning attended a Gymnasium in Meppel from April 1939 until September 1943