Question: what was the united states population in 1950
[{'answer': '150,697,361', 'provenance': [{'wikipedia_id': '4595400', 'title': '1950 United States Census', 'start_paragraph_id': 1, 'start_character': 132, 'end_paragraph_id': 1, 'end_character': 143, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4595400', 'title': '1950 United States Census', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 235, 'bleu_score': 0.943604326170661, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15248431607149145790}, 'section': 'Section::::Abstract.'}]}]