Question: an important ottonian church was built at hildesheim under
[{'answer': 'Bishop Altfrid', 'provenance': [{'wikipedia_id': '2808423', 'title': 'Hildesheim Cathedral', 'start_paragraph_id': 7, 'start_character': 37, 'end_paragraph_id': 7, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::History.:Construction.\n'}]}, {'provenance': [{'wikipedia_id': '2808423', 'title': 'Hildesheim Cathedral', 'start_paragraph_id': 7, 'start_character': 4, 'end_paragraph_id': 7, 'end_character': 958, 'bleu_score': 0.9480372296613011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17091701386281006001}, 'section': 'Section::::History.:Construction.\n'}]}]