Question: when was the first person sent to space
[{'answer': '12 April 1961', 'provenance': [{'wikipedia_id': '34226', 'title': 'Yuri Gagarin', 'start_paragraph_id': 1, 'start_character': 257, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]