Question: where did the us get uranium for the atomic bomb
[{'answer': 'the Belgian Congo', 'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 37, 'start_character': 538, 'end_paragraph_id': 37, 'end_character': 555, 'bleu_score': 1.0, 'section': 'Section::::Organization.:Collaboration with the United Kingdom.\n'}]}, {'provenance': [{'wikipedia_id': '19603', 'title': 'Manhattan Project', 'start_paragraph_id': 69, 'start_character': 0, 'end_paragraph_id': 69, 'end_character': 1033, 'bleu_score': 0.9326020945924981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10883052794347917562}, 'section': 'Section::::Uranium.:Ore.\n'}]}]