Question: when did the manhattan project began and end
[{'answer': 'From 1942 to 1946', 'provenance': [{'wikipedia_id': '2697091', 'title': 'Timeline of the Manhattan Project', 'start_paragraph_id': 1, 'start_character': 202, 'end_paragraph_id': 1, 'end_character': 219, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2697091', 'title': 'Timeline of the Manhattan Project', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 838, 'bleu_score': 0.9486173539240961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3840062405934021318}, 'section': 'Section::::Abstract.'}]}]