Question: when did the royal engineers win the fa cup
[{'answer': '1875', 'provenance': [{'wikipedia_id': '890107', 'title': 'Royal Engineers A.F.C.', 'start_paragraph_id': 1, 'start_character': 247, 'end_paragraph_id': 1, 'end_character': 251, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '890107', 'title': 'Royal Engineers A.F.C.', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 520, 'bleu_score': 0.977139080690077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5110775818235704595}, 'section': 'Section::::Abstract.'}]}]