Task: Translation
Input (Tagalog): Tagalog sentence: Gentzen naiiwan sa mga kawani at Gottingen hanggang 1943, bagaman niya upang magsagawa ng militar sa taong 1939 hanggang 1941.
Output (English): Gentzen remained on the staff at Göttingen until 1943, although he had to undertake military service in the years 1939 until 1941.