Question: when was the last time essendon won a grand final
[{'answer': '2000', 'provenance': [{'wikipedia_id': '10257', 'title': 'Essendon Football Club', 'start_paragraph_id': 62, 'start_character': 3, 'end_paragraph_id': 62, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:Kevin Sheedy era (1981–2007).\n'}]}]