Question: who is the highest goals scorer in la liga 2017
[{'answer': 'Lionel Messi', 'provenance': [{'wikipedia_id': '38088179', 'title': 'List of La Liga top scorers', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]