Question: when do you switch sides in beach volleyball
[{'answer': 'every seven points', 'provenance': [{'wikipedia_id': '224587', 'title': 'Beach volleyball', 'start_paragraph_id': 54, 'start_character': 106, 'end_paragraph_id': 54, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::Rules.:Differences with the indoor game.\n'}]}, {'provenance': [{'wikipedia_id': '224587', 'title': 'Beach volleyball', 'start_paragraph_id': 54, 'start_character': 0, 'end_paragraph_id': 54, 'end_character': 267, 'bleu_score': 0.9529077664391161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8005725627486934864}, 'section': 'Section::::Rules.:Differences with the indoor game.\n'}]}]