Question: which type of break is most common in commercial vehicles
[{'answer': 'Hydraulically actuated disc brakes', 'provenance': [{'wikipedia_id': '59597', 'title': 'Disc brake', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '59597', 'title': 'Disc brake', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 174, 'bleu_score': 0.9321022168949711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9965593087866003565}, 'section': 'Section::::Abstract.'}]}]