Question: when did japan go to war with russia
[{'answer': '8 February 1904', 'provenance': [{'wikipedia_id': '44575', 'title': 'Russo-Japanese War', 'start_paragraph_id': 61, 'start_character': 37, 'end_paragraph_id': 61, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Declaration of war.\n'}]}]