Question: which is the largest zoo in the uk
[{'answer': 'Chester', 'provenance': [{'wikipedia_id': '1005681', 'title': 'Chester Zoo', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1005681', 'title': 'Chester Zoo', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 222, 'bleu_score': 0.661322946943601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5410833632556924942}, 'section': 'Section::::Abstract.'}]}]