Question: what is a mars bar called in usa
[{'answer': 'Milky Way', 'provenance': [{'wikipedia_id': '247079', 'title': 'Mars (chocolate bar)', 'start_paragraph_id': 1, 'start_character': 350, 'end_paragraph_id': 1, 'end_character': 359, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]