Question: highest goal scorer between messi and c ronaldo
[{'answer': 'Ronaldo', 'provenance': [{'wikipedia_id': '43992506', 'title': 'Ronaldo–Messi rivalry', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]