Question: who commanded british forces at the battle of waterloo
[{'answer': 'the Duke of Wellington', 'provenance': [{'wikipedia_id': '4356', 'title': 'Battle of Waterloo', 'start_paragraph_id': 1, 'start_character': 304, 'end_paragraph_id': 1, 'end_character': 326, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4356', 'title': 'Battle of Waterloo', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 440, 'bleu_score': 0.794091276440817, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15194782113966263709}, 'section': 'Section::::Abstract.'}]}]