Question: when did west ham win the european cup
[{'answer': '1965', 'provenance': [{'wikipedia_id': '34679182', 'title': 'West Ham United F.C. in European football', 'start_paragraph_id': 1, 'start_character': 115, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '34679182', 'title': 'West Ham United F.C. in European football', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 377, 'bleu_score': 0.891621105621859, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6435303634160336625}, 'section': 'Section::::Abstract.'}]}]