Question: in which year was the maratha confederacy defeated by british
[{'answer': '1818', 'provenance': [{'wikipedia_id': '349068', 'title': 'Maratha Empire', 'start_paragraph_id': 1, 'start_character': 227, 'end_paragraph_id': 1, 'end_character': 231, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '349068', 'title': 'Maratha Empire', 'start_paragraph_id': 92, 'start_character': 0, 'end_paragraph_id': 92, 'end_character': 784, 'bleu_score': 0.9556930541639581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13759138979027278997}, 'section': 'Section::::Confederacy era.:British intervention.\n'}]}]