Question: who was the first man to travel in space
[{'answer': 'Yuri Alekseyevich Gagarin', 'provenance': [{'wikipedia_id': '34226', 'title': 'Yuri Gagarin', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]