Question: when did the u.s.s.r launch the first satellite to orbit the world
[{'answer': '4 October 1957', 'provenance': [{'wikipedia_id': '28484', 'title': 'Sputnik 1', 'start_paragraph_id': 1, 'start_character': 227, 'end_paragraph_id': 1, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28484', 'title': 'Sputnik 1', 'start_paragraph_id': 1, 'start_character': 92, 'end_paragraph_id': 1, 'end_character': 791, 'bleu_score': 0.5455988404233251, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4871774665662043157}, 'section': 'Section::::Abstract.'}]}]