Question: what is the biggest festival in the uk
[{'answer': 'Glastonbury', 'provenance': [{'wikipedia_id': '2082467', 'title': 'List of music festivals in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 240, 'end_paragraph_id': 1, 'end_character': 251, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2082467', 'title': 'List of music festivals in the United Kingdom', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 288, 'bleu_score': 0.9603762111511761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18013147487579923067}, 'section': 'Section::::Abstract.'}]}]