Question: why do the swiss put bells on their cows
[{'answer': 'to scare off any predators', 'provenance': [{'wikipedia_id': '8164966', 'title': 'Cowbell', 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8164966', 'title': 'Cowbell', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 238, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2510498054473434776}, 'section': 'Section::::Abstract.'}]}]