Question: how often do we have a census in the uk
[{'answer': 'every ten years', 'provenance': [{'wikipedia_id': '646660', 'title': 'List of United Kingdom censuses', 'start_paragraph_id': 1, 'start_character': 61, 'end_paragraph_id': 1, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '646660', 'title': 'List of United Kingdom censuses', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 627, 'bleu_score': 0.9591116223104591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5811863537881591510}, 'section': 'Section::::Abstract.'}]}]