Question: When did the manhattan project began and end?
Answer: From 1942 to 1946
Disambiguated annotations:
qaPairs: question: Based on the initial thoughts of the project, when did the Manhattan project begin and end?
answer: Began 1939, end 1946
question: Based on when the project was being worked on, when did the Manhattan project begin and end?
answer: Began 1942, end 1946