Question: who was proclaimed the german emperor in 1871
[{'answer': 'William I', 'provenance': [{'wikipedia_id': '151112', 'title': 'William I, German Emperor', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '151112', 'title': 'William I, German Emperor', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 796, 'bleu_score': 0.8096152835390341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3934193731505306604}, 'section': 'Section::::Abstract.'}]}]