Question: when was the first satellite sent into space
[{'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': 0, 'end_paragraph_id': 1, 'end_character': 889, 'bleu_score': 0.8525413026445361, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13589427156062532903}, 'section': 'Section::::Abstract.'}]}]