question: What was von Braun 's role in the army 's rocket program during during World War II ?
answer: technical director of the ballistic missile program
turker_answer: Von Braun 's role in the army 's rocket program during World War II was technical director of the ballistic missile program .
rule-based: Von Braun 's role in the army 's rocket program during during World War II was technical director of the ballistic missile program .