Question: how long is the halftime at the super bowl
[{'answer': 'around 30 minutes'}, {'provenance': [{'wikipedia_id': '1739648', 'title': 'Half-time', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 960, 'bleu_score': 0.9163260195660691, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4243970550777726468}, 'section': 'Section::::Abstract.'}]}]