Question: what was the code name of the us program to develop an atomic bomb
[{'answer': 'The Manhattan Project', 'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Manhattan', 'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Development of Substitute Materials', 'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 1, 'start_character': 576, 'end_paragraph_id': 1, 'end_character': 611, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1120, 'bleu_score': 0.9601876806302241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3745986027569827542}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3745986027569827542}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2032576', 'title': 'Nuclear weapons of the United States', 'section': 'Section::::Development agencies.\n', 'start_paragraph_id': 62, 'end_paragraph_id': 62, 'meta': {'evidence_span': ['This was the beginning of the Manhattan Project, run as the Manhattan Engineering District (MED), an agency under military control that was in charge of developing the first atomic weapons', 'This was the beginning of the Manhattan Project, run as the Manhattan Engineering District (MED), an agency under military control that was in charge of developing the first atomic weapons', 'This was the beginning of the Manhattan Project, run as the Manhattan Engineering District (MED), an agency under military control that was in charge of developing the first atomic weapons.']}}]}, {'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada.', 'The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons', 'The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs.']}}]}]