Question: the proof of having paid the road toll for swiss highways is called
[{'answer': 'Vignettes', 'provenance': [{'wikipedia_id': '4444420', 'title': 'Vignette (road tax)', 'start_paragraph_id': 1, 'start_character': 220, 'end_paragraph_id': 1, 'end_character': 229, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4444420', 'title': 'Vignette (road tax)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 557, 'bleu_score': 0.841826816830291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15279152378088923720}, 'section': 'Section::::Abstract.'}]}]