Question: when did the battle of kurukshetra take place
[{'answer': 'Indian kingdom called Kuru', 'provenance': [{'wikipedia_id': '2263093', 'title': 'Kurukshetra War', 'start_paragraph_id': 1, 'start_character': 261, 'end_paragraph_id': 1, 'end_character': 287, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2263093', 'title': 'Kurukshetra War', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 373, 'bleu_score': 0.923768200931469, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3497857758626604015}, 'section': 'Section::::Abstract.'}]}]